| Peter P. | Acker | Postmaster | 05 | 10 | 1838 | 49237 | Concord |
| William | Acker | Postmaster | 03 | 16 | 1861 | 49269 | Parma (Gidley’s Station until 01/28/1862) |
| William | Acker | Postmaster | 01 | 28 | 1862 | 49269 | Parma |
| George M. | Addison | Postmaster | 05 | 16 | 1895 | 49254 | Michigan Center |
| Patricia | Aldrich | Officer-In-Charge | 05 | 25 | 2011 | 49283 | Spring Arbor |
| Ransom E. | Aldrich | Postmaster | 01 | 25 | 1849 | 49269 | Parma (Gidley’s Station until 01/28/1862) |
| Ransom E. | Aldrich | Postmaster | 02 | 02 | 1852 | 49269 | Parma (Gidley’s Station until 01/28/1862) |
| Billy J. | Allen | Officer-In-Charge | 12 | 31 | 1987 | 49259 | Munith |
| Billy J. | Allen | Officer-In-Charge | 07 | 10 | 2002 | 49269 | Parma |
| David | Allen | Postmaster | 05 | 10 | 1853 | 49230 | Brooklyn |
| Grover W. | Allen | Acting Postmaster | 06 | 15 | 1933 | 49240 | Grass Lake |
| Grover W. | Allen | Postmaster | 01 | 20 | 1936 | 49240 | Grass Lake |
| Agnes E. | Andrews | Postmaster | 03 | 15 | 1915 | 49283 | Spring Arbor |
| Frank W. | Anthony | Postmaster | 08 | 21 | 1866 | 49201 | Jackson |
| Robynne | Apsey | Officer-In-Charge | 07 | 27 | 2004 | 49272 | Pleasant Lake |
| Chester | Armstrong | Postmaster | 05 | 30 | 1863 | 49269 | Parma |
| Abram | Arnold | Postmaster | 01 | 18 | 1853 | 49240 | Grass Lake |
| Addison J. | Austin | Postmaster | 06 | 25 | 1897 | 49263 | Norvell |
| Harvey | Austin | Postmaster | 03 | 17 | 1838 | 49263 | Norvell |
| Alfred E. | Bailey | Postmaster | 03 | 01 | 1880 | 49283 | Spring Arbor |
| Charles H. | Baker | Postmaster | 08 | 15 | 1893 | 49237 | Concord |
| Merwin O. | Baker | Postmaster | 04 | 18 | 1950 | 49241 | Hanover |
| James Z. | Ballard | Postmaster | 12 | 08 | 1855 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| Charles | Bancroft | Postmaster | 11 | 15 | 1880 | 49263 | Norvell |
| Fred C. | Barber | Postmaster | 04 | 20 | 1889 | | Leoni |
| Fred C. | Barber | Postmaster | 10 | 05 | 1897 | | Leoni |
| Zimri M. | Barber | Postmaster | 10 | 11 | 1849 | | Leoni |
| Zimri M. | Barber | Postmaster | 02 | 07 | 1881 | | Leoni |
| Mrs. G. Louise | Baremor | Acting Postmaster | 06 | 30 | 1947 | 49283 | Spring Arbor |
| Emilius | Bartholomew | Postmaster | 05 | 10 | 1861 | | Leoni |
| Fred J. | Beaman | Postmaster | 09 | 20 | 1922 | 49201 | Jackson |
| Cindi | Beard | Officer-In-Charge | 09 | 03 | 1982 | 49234 | Clarklake |
| Cindi L. | Beard | Postmaster | 08 | 17 | 1985 | 49272 | Pleasant Lake |
| Cindi L. | Beard | Postmaster | 01 | 11 | 2003 | 49230 | Brooklyn |
| Elizabeth E. | Beck | Postmaster | 08 | 16 | 1921 | 49263 | Norvell |
| Leila | Beckwith | Acting Postmaster | 04 | 16 | 1921 | 49263 | Norvell |
| Kenneth M. | Behm | Postmaster | 12 | 13 | 2025 | 49240 | Grass Lake |
| Araunah O. | Bell | Postmaster | 12 | 17 | 1861 | 49284 | Springport |
| Cheryl D. | Bell | Officer-In-Charge | 11 | 15 | 2011 | 49201 | Jackson |
| Cheryl D. | Bell | Postmaster | 08 | 10 | 2013 | 49201 | Jackson |
| Cheryl D. | Bell | Postmaster | 08 | 09 | 2025 | 49277 | Rives Junction |
| Hiram C. | Bell | Postmaster | 01 | 14 | 1869 | | Franciso (Franciscoville until 06/18/1877) |
| James C. | Bell | Postmaster | 08 | 21 | 1854 | 49246 | Horton (Baldwin’s Mills until 12/28/1871) |
| Mrs. Minowa L. | Bell | Postmaster | 04 | 24 | 1865 | 49284 | Springport |
| Diane M. | Bellew | Postmaster | 12 | 17 | 1988 | 49246 | Horton |
| Diane M. | Bellew | Postmaster | 09 | 07 | 2002 | 49254 | Michigan Center |
| Judith A. | Benn | Officer-In-Charge | 11 | 25 | 1992 | 49237 | Concord |
| Judith A. | Benn | Postmaster | 12 | 26 | 1992 | 49237 | Concord |
| Isaiah W. | Bennett | Postmaster | 06 | 24 | 1830 | 49201 | Jackson (Jacksonburgh until 02/18/1832) |
| Karen | Bennett | Officer-In-Charge | 11 | 27 | 1990 | 49234 | Clarklake |
| William M. | Bennett | Postmaster | 01 | 31 | 1888 | 49201 | Jackson |
| Edward | Blake | Acting Postmaster | 10 | 01 | 1933 | 49234 | Clarklake |
| David B. | Blanchard | Postmaster | 09 | 24 | 1864 | 49263 | Norvell |
| Valerie L. | Blank | Officer-In-Charge | 03 | 17 | 1986 | 49284 | Springport |
| Willard | Blevins | Officer-In-Charge | 11 | 10 | 2010 | 49201 | Jackson |
| Mrs. Frances M. | Bloom | Acting Postmaster | 09 | 16 | 1960 | 49234 | Clarklake |
| Joseph K. | Bodary | Officer-In-Charge | | | | 49201 | Jackson |
| John A. | Boehmke | Postmaster | 06 | 10 | 2017 | 49241 | Hanover |
| Jack E. | Bohne | Officer-In-Charge | 10 | 22 | 1977 | 49284 | Springport |
| Floyd L. | Bordner | Postmaster | 08 | 08 | 1981 | 49237 | Concord |
| Rebecca L. | Borton | Postmaster | 02 | 25 | 1989 | 49237 | Concord |
| Edwin P. | Bostwick | Postmaster | 04 | 08 | 1868 | | Franciso (Franciscoville until 06/18/1877) |
| Jack E. | Bowles | Officer-In-Charge | 12 | 10 | 1982 | 49261 | Napoleon |
| Diane | Brigham | Officer-In-Charge | 10 | 04 | 2010 | 49269 | Parma |
| Samuel | Bucknum | Postmaster | 05 | 08 | 1861 | 49283 | Spring Arbor |
| Samuel | Bunker | Postmaster | 07 | 30 | 1885 | 49240 | Grass Lake |
| James | Burley | Acting Postmaster | 10 | 15 | 1947 | 49241 | Hanover |
| Dawn | Burris | Officer-In-Charge | 08 | 07 | 2014 | 49254 | Michigan Center |
| Linda | Busche | Officer-In-Charge | | | | 49263 | Norvell (converted to a remotely managed Post Office under the direction of the Postmaster of the Brooklyn Post Office on 09/20/2014) |
| Henry | Butts | Postmaster | 12 | 06 | 1869 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| Joseph | Caldwell | Postmaster | 03 | 22 | 1869 | 49261 | Napoleon |
| Albert B. | Calkins | Postmaster | 11 | 16 | 1857 | 49284 | Springport |
| James | Cameron | Postmaster | 06 | 23 | 1932 | 49269 | Parma |
| Randy L. | Campbell | Officer-In-Charge | 10 | 04 | 2007 | 49201 | Jackson |
| Bryan E. | Carroll | Postmaster | 04 | 06 | 2024 | 49283 | Spring Arbor |
| Bryan E. | Carroll | Postmaster | 11 | 15 | 2025 | 49201 | Jackson |
| LaVern D. | Cash | Acting Postmaster | 05 | 08 | 1934 | 49230 | Brooklyn |
| LaVern D. | Cash | Postmaster | 04 | 26 | 1935 | 49230 | Brooklyn |
| Charles | Cassidy | Postmaster | 06 | 29 | 1893 | 49240 | Grass Lake |
| George R. | Chapman | Postmaster | 08 | 23 | 1869 | 49240 | Grass Lake |
| Carolyn | Charles | Officer-In-Charge | 06 | 14 | 1995 | 49201 | Jackson |
| Lavant M. | Charles | Postmaster | 11 | 20 | 1899 | 49234 | Clarklake |
| Florence | Cheetham (surname changed to Pulver by marriage by November, 1920) | Postmaster | 06 | 21 | 1919 | 49277 | Rives Junction |
| Reuben S. | Cheney | Postmaster | 03 | 16 | 1853 | 49201 | Jackson |
| Carole J. | Chmielewski | Officer-In-Charge | 10 | 02 | 1981 | 49246 | Horton |
| Carole J. | Chmielewski (surname changed to Sbardella at an unknown date) | Postmaster | 02 | 19 | 1983 | 49234 | Clarklake |
| Olaf | Christensen | Postmaster | 08 | 09 | 1940 | 49240 | Grass Lake |
| Austin | Church | Postmaster | 05 | 21 | 1858 | 49261 | Napoleon |
| Maryann | Cimock | Officer-In-Charge | 08 | 31 | 1987 | 49259 | Munith |
| Almeda L. | Clark | Officer-In-Charge | 02 | 29 | 2000 | 49246 | Horton |
| Henry C. | Clark | Postmaster | 04 | 12 | 1861 | 49230 | Brooklyn |
| Mrs. Kay D. | Cogan | Officer-In-Charge | 02 | 05 | 1973 | 49269 | Parma |
| Mrs. Kay D. | Cogan | Postmaster | 03 | 16 | 1974 | 49269 | Parma |
| George | Cogswell | Postmaster | 02 | 12 | 1856 | 49283 | Spring Arbor |
| Adaniram J. | Cole | Postmaster | 03 | 12 | 1866 | 49277 | Rives Junction (Eaton Rapids until 05/07/1866) |
| Adaniram J. | Cole | Postmaster | 05 | 07 | 1866 | 49277 | Rives Junction |
| Frank A. | Cole | Acting Postmaster | 08 | 01 | 1924 | 49240 | Grass Lake |
| Frank A. | Cole | Postmaster | 01 | 05 | 1925 | 49240 | Grass Lake |
| Daniel | Coleman | Postmaster | 08 | 08 | 1835 | 49201 | Jackson (Jacksonopolis until 12/08/1838) |
| Charles J. | Comstock | Postmaster | 04 | 24 | 1889 | 49284 | Springport |
| Albert | Congdon | Postmaster | 11 | 25 | 1856 | | Franciso (Franciscoville until 06/18/1877) |
| Albert | Congdon | Postmaster | 08 | 07 | 1861 | | Franciso (Franciscoville until 06/18/1877) |
| Jesse B. | Conklin | Postmaster | 09 | 14 | 1885 | 49284 | Springport |
| John E. | Conlan | Postmaster | 10 | 05 | 1901 | 49259 | Munith |
| M. Margaret | Conlan | Postmaster | 06 | 19 | 1907 | 49259 | Munith |
| Charles W. | Cook | Postmaster | 08 | 01 | 1889 | 49277 | Rives Junction |
| George P. | Cook | Postmaster | 11 | 12 | 1853 | 49230 | Brooklyn |
| Cornelius | Coolbaugh | Postmaster | 02 | 11 | 1845 | 49269 | Parma (Gidley’s Station until 01/28/1862) |
| Edmond L. | Cooper | Postmaster | 11 | 08 | 1875 | | Franciso (Franciscoville until 06/18/1877) |
| Edmond L. | Cooper | Postmaster | 06 | 18 | 1877 | | Franciso |
| Edmund L. | Cooper | Postmaster | 06 | 20 | 1889 | 49240 | Grass Lake |
| George B. | Cooper | Postmaster | 09 | 21 | 1836 | 49201 | Jackson (Jacksonopolis until 12/08/1838) |
| George B. | Cooper | Postmaster | 12 | 08 | 1838 | 49201 | Jackson |
| Ellsworth Mike | Cornish | Officer-In-Charge | 02 | 25 | 1988 | 49241 | Hanover |
| Ellsworth Mike | Cornish | Postmaster | 03 | 12 | 1988 | 49241 | Hanover |
| Elsworth M. | Cornish | Officer-In-Charge | 02 | 22 | 1980 | 49277 | Rives Junction |
| Elsworth M. | Cornish | Postmaster | 12 | 12 | 1992 | 49269 | Parma |
| Elsworth Mike | Cornish | Postmaster | 06 | 07 | 1997 | 49259 | Munith |
| John C. | Covert | Postmaster | 08 | 15 | 1893 | 49230 | Brooklyn |
| Mrs. Nora | Covert | Acting Postmaster | 09 | 01 | 1923 | 49284 | Springport |
| Mrs. Nora | Covert | Postmaster | 01 | 03 | 1924 | 49284 | Springport |
| Solomon C. | Crafts | Postmaster | 10 | 11 | 1849 | 49241 | Hanover |
| Mrs. Dorothy R. | Cramer | Acting Postmaster | 05 | 13 | 1935 | 49283 | Spring Arbor |
| Mrs. Dorothy R. | Cramer | Postmaster | 09 | 30 | 1936 | 49283 | Spring Arbor |
| Charles | Crane | Postmaster | 08 | 07 | 1890 | 49259 | Munith |
| Charles | Crane | Postmaster | 07 | 05 | 1898 | 49259 | Munith |
| Alberton | Crittenden | Postmaster | 07 | 24 | 1896 | 49254 | Michigan Center |
| Freeman R. | Crosby | Postmaster | 07 | 11 | 1893 | 49261 | Napoleon |
| Harvey | Crosby | Postmaster | 05 | 03 | 1870 | 49284 | Springport |
| Miss Mattie | Crosby | Postmaster | 06 | 01 | 1895 | 49261 | Napoleon |
| Paul | Cross | Postmaster | 01 | 12 | 1905 | 49259 | Munith |
| Moses P. | Crowell | Postmaster | 06 | 26 | 1837 | | Leoni |
| Moses P. | Crowell | Postmaster | 11 | 16 | 1855 | | Leoni |
| John | Cruttenden | Postmaster | 12 | 13 | 1837 | 49241 | Hanover |
| Mrs. Isabell H. | Cumberworth | Acting Postmaster | 01 | 15 | 1946 | 49277 | Rives Junction |
| Mrs. Isabell H. | Cumberworth (surname changed to Churchill by marriage on 11/16/1951) | Postmaster | 07 | 17 | 1947 | 49277 | Rives Junction |
| Mrs. Beverly M. | Cunningham | Acting Postmaster | 09 | 30 | 1961 | 49283 | Spring Arbor |
| Beverly M. | Cunningham (surname changed to Schwartz by Schwartz by marriage on 04/04/1973) | Postmaster | 08 | 18 | 1966 | 49283 | Spring Arbor |
| Timothy A. | Curran | Officer-In-Charge | 08 | 06 | 1998 | 49246 | Horton |
| Timothy A. | Curran | Postmaster | 02 | 08 | 2003 | 49246 | Horton |
| Timothy A. | Curran | Officer-In-Charge | 04 | 26 | 2007 | 49230 | Brooklyn |
| Timothy A. | Curran | Postmaster | 01 | 21 | 2017 | 49277 | Rives Junction |
| Frank E. | Curtis | Postmaster | 07 | 01 | 1889 | 49261 | Napoleon |
| Gordon | Davis | Officer-In-Charge | 04 | 29 | 1998 | 49237 | Concord |
| Mrs. Doris N. | Davis | Acting Postmaster | 05 | 19 | 1961 | 49234 | Clarklake |
| Robert | Davis | Postmaster | 04 | 15 | 1864 | 49240 | Grass Lake |
| Timmy D. | Davis | Officer-In-Charge | 06 | 05 | 2002 | 49237 | Concord |
| Timmy D. | Davis | Officer-In-Charge | 10 | 22 | 2003 | 49283 | Spring Arbor |
| Lucius J. | Dawes | Postmaster | 06 | 01 | 1861 | 49263 | Norvell |
| John | De Lamater | Postmaster | 08 | 07 | 1885 | 49230 | Brooklyn |
| Joseph D. | Dean | Postmaster | 06 | 18 | 1906 | 49263 | Norvell |
| William B. | Dean | Postmaster | 11 | 18 | 1903 | 49259 | Munith |
| Willard | Delamater | Postmaster | 10 | 18 | 1913 | 49234 | Clarklake |
| Thomas G. | DeVar | Postmaster | 06 | 18 | 1977 | 49201 | Jackson |
| Charles C. | Dewey | Postmaster | 09 | 14 | 1885 | 49261 | Napoleon |
| Harlow H. | Dewey | Postmaster | 10 | 21 | 1836 | 49261 | Napoleon |
| John | Dewey | Postmaster | 05 | 27 | 1837 | 49261 | Napoleon |
| James W. | Dey | Postmaster | 06 | 02 | 1897 | 49284 | Springport |
| Charles R. | Dixon | Officer-In-Charge | 12 | 30 | 1977 | 49277 | Rives Junction |
| Charles R. | Dixon | Postmaster | 12 | 24 | 1983 | 49241 | Hanover |
| Irving L. | Dixon | Postmaster | 04 | 24 | 1936 | 49237 | Concord |
| James M. | Dodge | Postmaster | 04 | 12 | 1861 | 49237 | Concord |
| Lemuel W. | Douglass | Postmaster | 05 | 04 | 1839 | 49283 | Spring Arbor |
| Francis A. | Drake | Postmaster | 04 | 06 | 1866 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| Joseph | Drake | Postmaster | 04 | 29 | 1839 | 49237 | Concord |
| John F. | Drew | Postmaster | 06 | 09 | 1868 | 49277 | Rives Junction |
| James | Dwelle | Postmaster | 04 | 08 | 1861 | 49240 | Grass Lake |
| Lemuel | Dwelle | Postmaster | 03 | 26 | 1873 | 49240 | Grass Lake |
| James A. | Dyer | Postmaster | 03 | 22 | 1849 | 49201 | Jackson |
| Henry E. | Edwards | Postmaster | 01 | 21 | 1898 | 49201 | Jackson |
| Arthur | Elmore | Postmaster | 06 | 10 | 1944 | 49241 | Hanover |
| Ara C. | Ennis | Postmaster | 12 | 13 | 1862 | 49230 | Brooklyn |
| Mrs. Margaret L. | Espie | Acting Postmaster | 07 | 16 | 1965 | 49241 | Hanover |
| Mrs. Margaret L. | Espie | Postmaster | 07 | 21 | 1967 | 49241 | Hanover |
| Frank Van | Etten | Postmaster | 09 | 15 | 1903 | 49254 | Michigan Center |
| Harry L. | Faling | Postmaster | 12 | 02 | 1963 | 49234 | Clarklake |
| Alanson | Ferris | Postmaster | 04 | 01 | 1852 | 49284 | Springport |
| Miss Audrey J. | Filley (name changed to Mrs. Audrey J. Podlo by marriage on 09/15/43 and changed to Audrey J. Huston by marriage on 07/22/1947) | Postmaster | 07 | 28 | 1937 | 49254 | Michigan Center |
| Jabez | Fisk | Postmaster | 01 | 03 | 1856 | | Franciso (Franciscoville until 06/18/1877) |
| Abel F. | Fitch | Postmaster | 02 | 01 | 1838 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| Karla | Fitton | Officer-In-Charge | 10 | 06 | 2012 | 49254 | Michigan Center |
| Edward D. | Flippo | Officer-In-Charge | 07 | 13 | 1991 | 49234 | Clarklake |
| Charles A. | Ford | Postmaster | 09 | 14 | 1885 | 49241 | Hanover |
| Stephen V. | Fortier | Officer-In-Charge | 09 | 08 | 1978 | 49234 | Clarklake |
| Frank | Forward | Postmaster | 07 | 05 | 1870 | 49283 | Spring Arbor |
| Isaac Van | Fossen | Postmaster | 01 | 15 | 1836 | 49237 | Concord |
| John M. | Fowler | Postmaster | 11 | 06 | 1885 | | Leoni |
| John M. | Fowler | Postmaster | 07 | 20 | 1893 | | Leoni |
| Henry A. | Francisco | Postmaster | 10 | 04 | 1843 | | Franciso (Franciscoville until 06/18/1877) |
| Henry E. | Francisco | Postmaster | 05 | 23 | 1852 | | Franciso (Franciscoville until 06/18/1877) |
| Henry E. | Francisco | Postmaster | 05 | 08 | 1863 | | Franciso (Franciscoville until 06/18/1877) |
| John | French | Postmaster | 09 | 17 | 1868 | 49283 | Spring Arbor |
| Noah | French | Postmaster | 09 | 02 | 1856 | 49283 | Spring Arbor |
| Noah | French | Postmaster | 06 | 28 | 1860 | 49283 | Spring Arbor |
| Squire | French | Postmaster | 02 | 03 | 1853 | 49283 | Spring Arbor |
| Wayne W. | Frey II | Postmaster | 07 | 20 | 1985 | 49254 | Michigan Center |
| Mrs. Wynne E. | Friend | Postmaster | 06 | 28 | 1980 | 49277 | Rives Junction |
| George B. | Frost | Postmaster | 07 | 13 | 1897 | 49230 | Brooklyn |
| Kaitlyn | Fulghum | Postmaster | 03 | 07 | 2026 | 49241 | Hanover |
| Noah | Fullington Jr. | Postmaster | 05 | 08 | 1849 | 49230 | Brooklyn |
| Walter J. G. | Dean | Postmaster | 04 | 04 | 1871 | 49241 | Hanover |
| Mrs. Virginia S. | Ganiard | Acting Postmaster | 03 | 31 | 1959 | 49234 | Clarklake |
| Nicholas A. | Garcia | Officer-In-Charge | 07 | 30 | 2021 | 49272 | Pleasant Lake |
| Nicholas A. | Garcia | Postmaster | 12 | 18 | 2021 | 49272 | Pleasant Lake |
| Ethany Edward | Gardner | Acting Postmaster | 09 | 08 | 1936 | 49254 | Michigan Center |
| Harlan P. | Gardner | Postmaster | 02 | 16 | 1874 | | Leoni |
| Hiram | Gardner | Postmaster | 10 | 08 | 1863 | | Leoni |
| Grace | Gates | Postmaster | 05 | 04 | 1909 | 49234 | Clarklake |
| Michael F. | Gavett | Officer-In-Charge | 10 | 28 | 2004 | 49272 | Pleasant Lake |
| Michael F. | Gavett | Officer-In-Charge | 03 | 10 | 2013 | 49230 | Brooklyn |
| Michael F. | Gavett | Postmaster | 10 | 31 | 2015 | 49272 | Pleasant Lake |
| Augustus F. | Gaylord | Postmaster | 12 | 08 | 1838 | 49284 | Springport |
| James P. | Gehring | Postmaster | 04 | 30 | 1983 | 49261 | Napoleon |
| William Jay | Gibbs | Officer-In-Charge | 03 | 21 | 1995 | 49201 | Jackson |
| Clarence H. | Gieske | Postmaster | 03 | 16 | 1937 | 49263 | Norvell |
| Mrs. Mana A. | Gieske | Acting Postmaster | 06 | 15 | 1954 | 49263 | Norvell |
| Mrs. Mana A. | Gieske | Postmaster | 05 | 06 | 1955 | 49263 | Norvell |
| John A. | Gillespie | Postmaster | 10 | 09 | 1897 | 49241 | Hanover |
| Marla R. | Gilpin | Postmaster | 01 | 20 | 1996 | 49241 | Hanover |
| Marla R. | Gilpin | Officer-In-Charge | 05 | 21 | 2002 | 49230 | Brooklyn |
| Benjamin F. | Gleason | Postmaster | 08 | 10 | 1846 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| Benjamin F. | Gleason | Postmaster | 12 | 28 | 1848 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| Benjamin F. | Gleason | Postmaster | 08 | 28 | 1857 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| Bertha | Godfrey | Postmaster | 05 | 29 | 1919 | 49261 | Napoleon |
| Jasper R. | Godfrey | Postmaster | 08 | 21 | 1889 | 49269 | Parma |
| Lyle M. | Godfrey | Postmaster | 01 | 05 | 1915 | 49261 | Napoleon |
| Seymour H. | Godfrey | Postmaster | 10 | 03 | 1893 | 49269 | Parma |
| John W. | Goll | Postmaster | 02 | 20 | 1982 | 49246 | Horton |
| Susan A. | Goodrich | Officer-In-Charge | 08 | 07 | 1987 | 49261 | Napoleon |
| Aaron B. | Goodwin | Postmaster | 01 | 05 | 1833 | 49261 | Napoleon |
| William F. | Goodwin | Postmaster | 01 | 09 | 1850 | 49237 | Concord |
| Duty | Gorton | Postmaster | 09 | 20 | 1864 | 49230 | Brooklyn |
| Gary D. | Goss | Postmaster | 12 | 17 | 1988 | 49259 | Munith |
| Alton W. | Grandy | Postmaster | 09 | 23 | 1897 | 49277 | Rives Junction |
| Peggy L. | Granger | Officer-In-Charge | 01 | 21 | 2006 | 49283 | Spring Arbor |
| Peggy L. | Granger | Postmaster | 10 | 07 | 2023 | 49254 | Michigan Center |
| Jerome B. | Green | Postmaster | 05 | 08 | 1861 | 49241 | Hanover |
| Mrs. Louise M. | Greenfield | Officer-In-Charge | 06 | 30 | 1972 | 49240 | Grass Lake |
| Mrs. Louise M. | Greenfield | Postmaster | 02 | 17 | 1973 | 49240 | Grass Lake |
| David H. | Gregory | Postmaster | 11 | 08 | 1935 | 49234 | Clarklake |
| Edwin L. | Groger | Postmaster | 03 | 28 | 1911 | 49237 | Concord |
| Andrew P. | Groll | Postmaster | 06 | 15 | 2013 | 49241 | Hanover |
| Andrew P. | Groll | Postmaster | 03 | 23 | 2013 | 49254 | Michigan Center |
| Andrew P. | Groll | Postmaster | 03 | 18 | 2017 | 49246 | Horton |
| Andrew P. | Groll | Postmaster | 11 | 19 | 2022 | 49240 | Grass Lake |
| Linda L. | Gurka | Postmaster | 06 | 30 | 2012 | 49269 | Parma |
| Mrs. Barbara Louise | Haag | Acting Postmaster | 08 | 27 | 1965 | 49263 | Norvell |
| Mrs. Barbara Louise | Haag | Postmaster | 04 | 04 | 1968 | 49263 | Norvell |
| Matthew J. | Haines | Postmaster | 08 | 14 | 1999 | 49263 | Norvell |
| Matthew J. | Haines | Officer-In-Charge | 09 | 10 | 2002 | 49272 | Pleasant Lake |
| Matthew J. | Haines | Postmaster | 02 | 07 | 2004 | 49283 | Spring Arbor |
| Amy M. | Haire | Officer-In-Charge | 05 | 25 | 2002 | 49234 | Clarklake |
| Amy M. | Haire (surname changed to Klee on 12/08/2009) | Postmaster | 11 | 02 | 2002 | 49234 | Clarklake |
| Francis H. | Halbert | Postmaster | 12 | 06 | 1864 | | Franciso (Franciscoville until 06/18/1877) |
| Lorenzo D. | Hale | Postmaster | 12 | 30 | 1839 | 49240 | Grass Lake |
| Chancelor P. | Hammond | Postmaster | 05 | 20 | 1872 | | Stonypoint (Stony Point until 05/03/1894) |
| Hylas H. | Hammond | Postmaster | 07 | 20 | 1861 | 49246 | Horton (Baldwin’s Mills until 12/28/1871) |
| William M. | Hankerd | Acting Postmaster | 08 | 01 | 1933 | 49259 | Munith |
| William M. | Hankerd | Postmaster | 05 | 22 | 1934 | 49259 | Munith |
| Oscar J. R. | Hanna | Postmaster | 04 | 10 | 1902 | 49201 | Jackson |
| Henry A. | Harmon | Postmaster | 09 | 20 | 1866 | 49230 | Brooklyn |
| George W. | Harrington | Postmaster | 09 | 14 | 1885 | 49283 | Spring Arbor |
| George W. | Harrington | Postmaster | 10 | 16 | 1893 | 49283 | Spring Arbor |
| Deborah S. | Harris | Postmaster | 05 | 16 | 2015 | 49283 | Spring Arbor |
| Ella | Harris | Postmaster | 04 | 27 | 1914 | 49263 | Norvell |
| Moses L. | Hart | Postmaster | 06 | 04 | 1873 | 49283 | Spring Arbor |
| Moses L. | Hart | Postmaster | 03 | 21 | 1879 | 49283 | Spring Arbor |
| Joseph | Hartson | Postmaster | 02 | 12 | 1859 | 49283 | Spring Arbor |
| David E. | Haskins | Postmaster | 07 | 30 | 1885 | 49237 | Concord |
| Mark B. | Hawes | Postmaster | 01 | 05 | 1915 | 49269 | Parma |
| Mark B. | Hawes | Acting Postmaster | 11 | 01 | 1936 | 49269 | Parma |
| Mark B. | Hawes | Postmaster | 02 | 09 | 1937 | 49269 | Parma |
| Susan M. | Hawkins | Officer-In-Charge | 07 | 16 | 1987 | 49241 | Hanover |
| Gamael W. | Hazen | Postmaster | 03 | 15 | 1915 | 49277 | Rives Junction |
| Eldredge L. | Heath | Postmaster | 08 | 15 | 1893 | 49241 | Hanover |
| John | Heffernan | Postmaster | 07 | 30 | 1885 | 49277 | Rives Junction |
| Albert M. | Helmer | Postmaster | 09 | 11 | 1885 | 49269 | Parma |
| Edward J. | Hendges | Officer-In-Charge | 02 | 04 | 2002 | 49269 | Parma |
| Edward Joseph | Hendges | Postmaster | 10 | 05 | 2002 | 49269 | Parma |
| Marlene A. | Herzberg | Officer-In-Charge | 10 | 05 | 1979 | 49230 | Brooklyn |
| Hugh H. | Hess | Postmaster | 02 | 05 | 1907 | 49261 | Napoleon |
| George | Higgins | Postmaster | 03 | 08 | 1875 | | Franciso (Franciscoville until 06/18/1877) |
| Lewis A. | Hine | Postmaster | 12 | 23 | 1842 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| Jonathan P. | Hinshaw | Postmaster | 12 | 21 | 1868 | 49230 | Brooklyn |
| Hiram C. | Hodge | Postmaster | 01 | 03 | 1855 | 49237 | Concord |
| Mrs. M. | Hoffman | Acting Postmaster | 03 | 31 | 1944 | 49259 | Munith |
| Mrs. Margaret | Hoffman | Postmaster | 03 | 22 | 1946 | 49259 | Munith |
| John W. | Holmes | Postmaster | 03 | 20 | 1879 | 49246 | Horton |
| Miss Merle E. | Houghtby | Postmaster | 07 | 03 | 1918 | 49283 | Spring Arbor |
| Nelson | Hoyt | Postmaster | 04 | 28 | 1880 | 49259 | Munith |
| Nelson | Hoyt | Postmaster | 08 | 31 | 1889 | 49259 | Munith |
| Carmen D. | Hughes | Postmaster | 07 | 10 | 2004 | 49201 | Jackson |
| Samuel D. | Humphrey | Postmaster | 09 | 21 | 1897 | 49283 | Spring Arbor |
| Addison | Hunt | Postmaster | 07 | 01 | 1889 | 49263 | Norvell |
| Adoniram J. | Hunt | Postmaster | 06 | 03 | 1854 | 49261 | Napoleon |
| Silas P. | Hutchinson | Postmaster | 04 | 13 | 1861 | 49261 | Napoleon |
| Asher L. | Hyliard | Postmaster | 08 | 18 | 1949 | 49237 | Concord |
| Mrs. M. Rhoda | Hyliard (name changed to Mrs. M. Rhoda Hartzell on 06/09/1962) | Postmaster | 09 | 01 | 1961 | 49237 | Concord |
| Mrs. Marilyn R. | Hyliard (name changed to Mrs. M. Rhoda Hyliard on 12/17/1959) | Acting Postmaster | 05 | 19 | 1959 | 49237 | Concord |
| Timothy C. | Inman | Officer-In-Charge | 02 | 18 | 2004 | 49201 | Jackson |
| Timothy C. | Inman | Officer-In-Charge | 07 | 11 | 2008 | 49201 | Jackson |
| Joseph D. | Irish | Postmaster | 11 | 29 | 1851 | 49269 | Parma (Gidley’s Station until 01/28/1862) |
| William | Jackson | Postmaster | 10 | 22 | 1841 | | Leoni |
| William | Jackson | Postmaster | 06 | 09 | 1849 | | Leoni |
| William | Jackson | Postmaster | 02 | 18 | 1850 | | Leoni |
| Harvey J. | Jackson, Jr. | Postmaster | 06 | 09 | 2018 | 49254 | Michigan Center |
| Diane L. | Jagelka (surname changed to Brigham on 01/13/2006) | Postmaster | 11 | 30 | 2002 | 49237 | Concord |
| Charles R. | Jarrett | Officer-In-Charge | 07 | 05 | 2006 | 49201 | Jackson |
| Cynthia | Johnson | Officer-In-Charge | 06 | 09 | 1995 | 49241 | Hanover |
| Angela E. | Jones | Officer-In-Charge | 10 | 02 | 1995 | 49277 | Rives Junction |
| Angela E. | Jones | Postmaster | 11 | 11 | 1995 | 49277 | Rives Junction |
| Crystal M. | Jones | Postmaster | 12 | 13 | 2025 | 49283 | Spring Arbor |
| Lucien M. | Jones | Postmaster | 11 | 17 | 1873 | 49261 | Napoleon |
| William | Jones | Postmaster | 12 | 02 | 1843 | 49230 | Brooklyn |
| Candice | Jordan | Officer-In-Charge | 11 | 14 | 2017 | 49254 | Michigan Center |
| Lu Ann D. | Jordan-Roberts | Postmaster | 09 | 20 | 2003 | 49261 | Napoleon |
| Paul Andrew | Jorgensen | Acting Postmaster | 01 | 29 | 1965 | 49269 | Parma |
| Paul Andrew | Jorgensen | Postmaster | 08 | 30 | 1965 | 49269 | Parma |
| Herman | Kalmbach | Postmaster | 01 | 06 | 1897 | | Franciso |
| Neil G. | Kalmbach | Acting Postmaster | 10 | 31 | 1956 | 49240 | Grass Lake |
| Neil G. | Kalmbach | Postmaster | 08 | 05 | 1958 | 49240 | Grass Lake |
| Vicki | Kalmbach | Officer-In-Charge | 06 | 11 | 2002 | 49254 | Michigan Center |
| Vicki S. | Kalmbach | Officer-In-Charge | 07 | 29 | 1988 | 49263 | Norvell |
| Vicki S. | Kalmbach | Postmaster | 11 | 23 | 1996 | 49283 | Spring Arbor |
| Vicki S. | Kalmbach | Postmaster | 10 | 06 | 2012 | 49240 | Grass Lake |
| Thomas L. | Keehn | Postmaster | 12 | 26 | 1992 | 49284 | Springport |
| George W. | Kennedy | Postmaster | 09 | 01 | 1853 | 49241 | Hanover |
| Dawn L. | Kibbey | Officer-In-Charge | 10 | 31 | 2018 | 49240 | Grass Lake |
| Dawn L. | Kibbey | Postmaster | 03 | 31 | 2018 | 49269 | Parma |
| Theresa A. | Kimbrough | Officer-In-Charge | 01 | 14 | 2008 | 49201 | Jackson |
| Charles F. | King | Postmaster | 05 | 13 | 1891 | 49283 | Spring Arbor |
| George B. | King | Postmaster | 09 | 10 | 1897 | 49269 | Parma |
| Reuben H. | King | Postmaster | 04 | 28 | 1843 | 49277 | Rives Junction (West Rives until 03/12/1866) |
| Reuben H. | King | Postmaster | 10 | 16 | 1862 | 49277 | Rives Junction (West Rives until 03/12/1866) |
| Jack W. | Kline | Officer-In-Charge | 11 | 25 | 1983 | 49241 | Hanover |
| Jack W. | Kline | Postmaster | 10 | 25 | 1986 | 49284 | Springport |
| Clarence | Knight | Officer-In-Charge | 05 | 27 | 1988 | 49201 | Jackson |
| John W. | Knox | Postmaster | 03 | 25 | 1870 | 49241 | Hanover |
| Dale | Koebel | Officer-In-Charge | 10 | 02 | 1992 | 49240 | Grass Lake |
| Charles B. | Kress | Postmaster | 05 | 19 | 1863 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| Cynthia | Ksiazkiewicz | Officer-In-Charge | 09 | 03 | 2002 | 49269 | Parma |
| Cynthia | Ksiazkiewicz | Officer-In-Charge | 01 | 21 | 2004 | 49269 | Parma |
| Melissa Ann | Kurzynowski | Officer-In-Charge | 07 | 21 | 2004 | 49261 | Napoleon |
| Heidi L. | Lanius | Officer-In-Charge | 10 | 16 | 2012 | 49269 | Parma |
| Heidi L. | Lanius | Postmaster | 03 | 23 | 2013 | 49269 | Parma |
| Donna | Larder | Officer-In-Charge | 11 | 20 | 1987 | 49259 | Munith |
| Daniel | Larzelere | Postmaster | 06 | 26 | 1849 | 49240 | Grass Lake |
| Norman W. | Latham | Postmaster | 12 | 11 | 1902 | 49241 | Hanover |
| Henry | Laughlin | Postmaster | 03 | 20 | 1915 | 49246 | Horton |
| Peter P. | Lawrence | Postmaster | 04 | 09 | 1845 | | Leoni |
| James E. | Learnard | Postmaster | 03 | 29 | 1900 | 49261 | Napoleon |
| Mrs. Frances L. | Lee | Postmaster | 08 | 18 | 1949 | 49283 | Spring Arbor |
| Edwin G. | Lewis | Postmaster | 12 | 03 | 1860 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| George | Liebeck | Acting Postmaster | 06 | 01 | 1956 | 49259 | Munith |
| George | Liebeck | Postmaster | 08 | 06 | 1957 | 49259 | Munith |
| Victoria | Lige | Officer-In-Charge | 04 | 26 | 2012 | 49269 | Parma |
| Victoria | Lige | Officer-In-Charge | 04 | 22 | 2014 | 49269 | Parma |
| Loretta J. | Ligon | Officer-In-Charge | 05 | 18 | 1988 | 49201 | Jackson |
| Leon | Loper | Postmaster | 09 | 01 | 1937 | 49241 | Hanover |
| George C. | Lord | Postmaster | 08 | 15 | 1853 | 49240 | Grass Lake |
| Mrs. Nellie E. | Loucks | Postmaster | 10 | 15 | 1929 | 49263 | Norvell |
| Douglas L. | Lovett | Postmaster | 03 | 11 | 2000 | 49201 | Jackson |
| Alden S. | Luce | Postmaster | 09 | 01 | 1853 | | Leoni |
| Alden S. | Luce | Postmaster | 02 | 23 | 1859 | | Leoni |
| Cornelius F. E. | Luce | Postmaster | 03 | 24 | 1859 | 49240 | Grass Lake |
| Elmer A. | Luce | Postmaster | 03 | 14 | 1923 | 49261 | Napoleon |
| Lora J. | Luce | Acting Postmaster | 12 | 13 | 1933 | 49261 | Napoleon |
| Luther H. | Ludlow | Postmaster | 03 | 20 | 1884 | 49269 | Parma |
| Michael J. | Lutz | Postmaster | 07 | 09 | 1994 | 49272 | Pleasant Lake |
| Michael J. | Lutz | Officer-In-Charge | | | | 49272 | Pleasant Lake |
| Allen C. | Manly | Postmaster | 05 | 19 | 1871 | 49261 | Napoleon |
| Edward J. | Marrinane | Postmaster | 01 | 18 | 1916 | 49240 | Grass Lake |
| Barbara A. | Marshall | Postmaster | 06 | 13 | 2026 | 49254 | Michigan Center |
| Edmund J. | Marvin | Postmaster | 04 | 08 | 1978 | 49277 | Rives Junction |
| Edmund J. | Marvin | Postmaster | 02 | 09 | 1980 | 49230 | Brooklyn |
| John S. | Masuga | Postmaster | 05 | 05 | 1979 | 49234 | Clarklake |
| Charles A. | Mathews | Acting Postmaster | 07 | 14 | 1928 | 49263 | Norvell |
| Brian S. | Maxson | Postmaster | 10 | 07 | 2023 | 49241 | Hanover |
| Ronald G. | Mayer | Postmaster | 08 | 20 | 1983 | 49259 | Munith |
| Michele | McAuliffe | Officer-In-Charge | 12 | 28 | 2001 | 49254 | Michigan Center |
| Michele Y. | McAuliffe | Officer-In-Charge | 11 | 29 | 2005 | 49254 | Michigan Center |
| Michele Y. | McAuliffe | Postmaster | 03 | 04 | 2006 | 49254 | Michigan Center |
| Michele Y. | McAuliffe | Postmaster | 06 | 15 | 2013 | 49254 | Michigan Center |
| Michelle Y. | McAuliffe | Postmaster | 10 | 06 | 2012 | 49241 | Hanover |
| Pamela J. | McClain | Officer-In-Charge | 10 | 14 | 1988 | 49246 | Horton |
| Pamela J. | McClain | Postmaster | 11 | 16 | 1991 | 49263 | Norvell |
| Samuel | McClellan | Postmaster | 02 | 15 | 1915 | 49284 | Springport |
| Barbara | McClinchey | Officer-In-Charge | 04 | 23 | 1990 | 49259 | Munith |
| James K. | McConnell | Officer-In-Charge | 06 | 29 | 1973 | 49201 | Jackson |
| James K. | McConnell | Postmaster | 01 | 05 | 1974 | 49201 | Jackson |
| Lori A. | McDowell | Postmaster | 06 | 15 | 2013 | 49230 | Brooklyn |
| Mrs. Blanche | McGraw | Postmaster | 07 | 03 | 1935 | 49261 | Napoleon |
| Mordicai L. | Meade | Postmaster | 05 | 29 | 1866 | 49283 | Spring Arbor |
| David | Menzie | Postmaster | 09 | 01 | 1853 | 49237 | Concord |
| Mrs. Dell | Merry | Acting Postmaster | 07 | 31 | 1942 | 49234 | Clarklake |
| Mrs. Dell | Merry | Postmaster | 03 | 19 | 1943 | 49234 | Clarklake |
| Martin | Metheringham | Officer-In-Charge | 01 | 20 | 2005 | 49284 | Springport |
| Martin J. | Metheringham | Postmaster | 07 | 26 | 2003 | 49272 | Pleasant Lake |
| Corbly G. | Miller | Postmaster | 10 | 11 | 1906 | 49234 | Clarklake |
| Herbert C. | Miller | Acting Postmaster | 01 | 15 | 1950 | 49230 | Brooklyn |
| Krista M. | Miller | Officer-In-Charge | 07 | 31 | 2003 | 49283 | Spring Arbor |
| Mark | Miller | Postmaster | 09 | 26 | 1877 | 49269 | Parma |
| Mrs. Kathryn R. | Miller | Officer-In-Charge | 03 | 03 | 1983 | 49259 | Munith |
| Vester E. | Mock | Acting Postmaster | 01 | 31 | 1946 | 49284 | Springport |
| Vester E. | Mock | Postmaster | 03 | 17 | 1949 | 49284 | Springport |
| Charles W. | Montgomery | Postmaster | 09 | 14 | 1885 | 49246 | Horton |
| Mrs. Viola | Moon | Acting Postmaster | 07 | 21 | 1961 | 49234 | Clarklake |
| Linda A. | Morgan | Officer-In-Charge | 09 | 13 | 2004 | 49241 | Hanover |
| Edward C. | Morrissey | Postmaster | 12 | 20 | 1893 | 49201 | Jackson |
| Abraham N. | Moulton | Postmaster | 04 | 14 | 1851 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| Arba N. | Moulton | Postmaster | 01 | 30 | 1846 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| Thomas | Murney | Postmaster | 08 | 26 | 1889 | 49230 | Brooklyn |
| Daniel J. | Newman | Postmaster | 11 | 22 | 1986 | 49240 | Grass Lake |
| Cindy L. | Nichols | Officer-In-Charge | 11 | 07 | 1991 | 49261 | Napoleon |
| Heather | Nichols | Officer-In-Charge | 09 | 28 | 2004 | 49284 | Springport |
| Heather | Nichols | Officer-In-Charge | 09 | 30 | 2008 | 49269 | Parma |
| Heather L. | Nichols | Postmaster | 03 | 19 | 2005 | 49284 | Springport (converted to a Level 6 (6-hour) remotely managed Post Office under the direction of the Postmaster of the Albion Post Office on 11/17/2012) |
| Heather L. | Nichols | Postmaster | 06 | 30 | 2012 | 49283 | Spring Arbor |
| Judy | Noren | Officer-In-Charge | 10 | 15 | 1988 | 49284 | Springport |
| Michael | Nowak | Officer-In-Charge | 07 | 23 | 2012 | 49241 | Hanover |
| Lucille A. | O'Byrne | Officer-In-Charge | 05 | 01 | 2003 | 49272 | Pleasant Lake |
| John W. | O'Leary | Postmaster | 07 | 21 | 1913 | 49230 | Brooklyn |
| Robert T. | Oaks | Officer-In-Charge | 03 | 13 | 2006 | 49201 | Jackson |
| Gaylord R. | Ohlerich | Officer-In-Charge | 06 | 30 | 1972 | 49277 | Rives Junction |
| Gaylord R. | Ohlerich | Postmaster | 12 | 09 | 1972 | 49277 | Rives Junction |
| Henry C. | Orendorff | Postmaster | 04 | 01 | 1839 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| John S. | Osborn | Postmaster | 04 | 08 | 1865 | 49277 | Rives Junction (West Rives until 03/12/1866) |
| John S. | Osborn | Postmaster | 08 | 20 | 1869 | 49277 | Rives Junction |
| Leo E. | Osterberg | Acting Postmaster | 10 | 02 | 1961 | 49272 | Pleasant Lake |
| Leo E. | Osterberg | Postmaster | 04 | 02 | 1963 | 49272 | Pleasant Lake |
| Helen O. | Paddock | Postmaster | 02 | 03 | 1882 | 49237 | Concord |
| D. Gibbs | Palmer | Postmaster | 09 | 21 | 1901 | 49254 | Michigan Center |
| Stephen W. | Palmer | Postmaster | 01 | 06 | 1846 | 49263 | Norvell |
| Timothy | Pangborn | Postmaster | 03 | 22 | 1869 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| John | Parliman | Postmaster | 02 | 23 | 1849 | 49237 | Concord |
| Barbara | Parshall | Officer-In-Charge | 10 | 29 | 1996 | 49261 | Napoleon |
| Thor J. | Payne | Postmaster | 05 | 30 | 1992 | 49259 | Munith |
| Benjamin F. | Peckham | Postmaster | 01 | 28 | 1924 | 49269 | Parma |
| Marcia K. | Penix | Postmaster | 08 | 09 | 2014 | 49269 | Parma |
| Reuben D. | Perrine | Postmaster | 08 | 10 | 1868 | 49277 | Rives Junction |
| Curtis A. | Peterson | Officer-In-Charge | 08 | 19 | 1988 | 49261 | Napoleon |
| Lewis L. | Peterson | Postmaster | 04 | 24 | 1936 | 49284 | Springport |
| Joseph A. | Picard | Acting Postmaster | 07 | 01 | 1935 | 49201 | Jackson |
| Joseph A. | Picard | Postmaster | 01 | 20 | 1936 | 49201 | Jackson |
| Elisha | Pickins | Postmaster | 01 | 23 | 1866 | | Franciso (Franciscoville until 06/18/1877) |
| Joseph B. | Pierce | Postmaster | 04 | 01 | 1839 | 49240 | Grass Lake |
| Ira A. | Pittman | Postmaster | 02 | 13 | 1925 | 49263 | Norvell |
| George W. | Pixley | Postmaster | 09 | 14 | 1885 | 49259 | Munith |
| Charles H. | Plowe | Postmaster | 10 | 29 | 1885 | | Franciso |
| Linda L. | Plyler | Officer-In-Charge | 06 | 10 | 1988 | 49259 | Munith |
| David R. | Pollard | Postmaster | 02 | 25 | 1989 | 49201 | Jackson |
| Samuel G. | Porter | Postmaster | 09 | 03 | 1867 | 49284 | Springport |
| James | Powell | Postmaster | 12 | 04 | 1871 | | Franciso (Franciscoville until 06/18/1877) |
| Stephanie S. | Powers | Postmaster | 05 | 06 | 2023 | 49230 | Brooklyn |
| Alvin J. | Prejean Sr. | Postmaster | 02 | 01 | 1986 | 49201 | Jackson |
| Samuel | Prescott | Postmaster | 06 | 15 | 1839 | 49277 | Rives Junction (West Rives until 03/12/1866) |
| Calvin | Preston | Postmaster | 09 | 20 | 1869 | | Franciso (Franciscoville until 06/18/1877) |
| George | Preston | Postmaster | 06 | 15 | 1897 | 49240 | Grass Lake |
| DeWitt | Pretty | Postmaster | 12 | 01 | 1876 | 49283 | Spring Arbor |
| William H. | Price | Postmaster | 02 | 24 | 1860 | 49284 | Springport |
| Mary Catherine | Puckett | Officer-In-Charge | 08 | 01 | 1986 | 49240 | Grass Lake |
| Arthur | Punches | Postmaster | 06 | 29 | 1893 | 49284 | Springport |
| Joseph B. | Putnam | Postmaster | 01 | 25 | 1862 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| Samuel | Quigley | Postmaster | 08 | 09 | 1833 | 49261 | Napoleon |
| Edgar E. | Ranney | Postmaster | 06 | 05 | 1893 | 49277 | Rives Junction |
| Brian D. | Ransom | Postmaster | 12 | 17 | 2022 | 49246 | Horton |
| G. Ray | Reed | Postmaster | 03 | 14 | 1927 | 49234 | Clarklake |
| Jay D. | Reed | Postmaster | 04 | 25 | 1896 | 49234 | Clarklake |
| William F. | Reimenschneider | Postmaster | 01 | 09 | 1879 | | Franciso |
| William F. | Reimenschneider | Postmaster | 12 | 13 | 1889 | | Franciso |
| Charles R. | Rice | Postmaster | 04 | 18 | 1876 | | Stonypoint (Stony Point until 05/03/1894) |
| Lyle A. | Richards | Officer-In-Charge | 05 | 26 | 1973 | 49234 | Clarklake |
| Lyle A. | Richards | Postmaster | 12 | 08 | 1973 | 49234 | Clarklake |
| Josiah C. | Richardson | Postmaster | 03 | 23 | 1906 | 49201 | Jackson |
| Betty A. | Rickerd | Postmaster | 02 | 16 | 2019 | 49240 | Grass Lake |
| Betty Ann | Rickerd | Officer-In-Charge | 05 | 26 | 2005 | 49259 | Munith |
| Oramel L. | Rider | Postmaster | 05 | 11 | 1857 | 49240 | Grass Lake |
| Dallas R. | Ries | Postmaster | 11 | 29 | 1980 | 49283 | Spring Arbor |
| Elizabeth (Rowe) | Riggs | Postmaster | 06 | 18 | 1921 | 49259 | Munith |
| Josiah C. | Riley | Postmaster | 01 | 22 | 1855 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| Paul B. | Ring | Postmaster | 02 | 06 | 1844 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| Leland H. | Robertson | Officer-In-Charge | 09 | 01 | 1988 | 49237 | Concord |
| Joyce E. | Robison | Officer-In-Charge | 09 | 18 | 1987 | 49246 | Horton |
| James E. | Rodesiler | Postmaster | 11 | 26 | 2005 | 49241 | Hanover |
| Margaret | Rodesiler | Officer-In-Charge | 09 | 23 | 2002 | 49272 | Pleasant Lake |
| Margaret R. | Rodesiler | Officer-In-Charge | 07 | 19 | 1996 | 49283 | Spring Arbor |
| Margaret R. | Rodesiler | Postmaster | 09 | 12 | 1998 | 49261 | Napoleon |
| Sidney B. | Rodgers | Postmaster | 03 | 04 | 1879 | 49261 | Napoleon |
| Charissee D. | Rogers | Postmaster | 08 | 26 | 2023 | 49283 | Spring Arbor |
| Mrs. Harriet A. | Rogers | Postmaster | 03 | 10 | 1884 | 49261 | Napoleon |
| Frank E. | Romine | Postmaster | 02 | 14 | 1903 | 49261 | Napoleon |
| Amos | Root | Postmaster | 04 | 10 | 1861 | 49201 | Jackson |
| Charles | Root | Postmaster | 05 | 11 | 1857 | 49237 | Concord |
| Shirley | Rose | Officer-In-Charge | | | | 49272 | Pleasant Lake |
| J. Henry | Rowe | Postmaster | 08 | 21 | 1897 | 49237 | Concord |
| Thomas R. | Russell | Officer-In-Charge | 03 | 28 | 1980 | 49283 | Spring Arbor |
| Thomas R. | Russell | Postmaster | 01 | 09 | 1993 | 49240 | Grass Lake |
| Horace B. | Safford | Postmaster | 10 | 27 | 1847 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| Frank D. | Scherer | Postmaster | 01 | 20 | 1901 | | Franciso |
| George W. | Scherer | Postmaster | 05 | 24 | 1906 | | Franciso |
| Edward C. | Schmidt | Acting Postmaster | 06 | 30 | 1951 | 49284 | Springport |
| Edward C. | Schmidt | Postmaster | 07 | 17 | 1954 | 49284 | Springport |
| Freeman W. | Schofield | Postmaster | 11 | 09 | 1885 | 49263 | Norvell |
| Freeman W. | Schofield | Postmaster | 07 | 01 | 1893 | 49263 | Norvell |
| Diane | Schook | Officer-In-Charge | 11 | 28 | 1995 | 49241 | Hanover |
| Diane E. | Schook | Postmaster | 04 | 04 | 1992 | 49261 | Napoleon |
| Fred F. | Scidmore | Postmaster | 06 | 06 | 1883 | 49240 | Grass Lake |
| Date | Scofield | Postmaster | 08 | 11 | 1904 | | Leoni |
| William L. | Seaton | Postmaster | 03 | 19 | 1867 | 49201 | Jackson |
| William L. | Seaton | Postmaster | 09 | 28 | 1889 | 49201 | Jackson |
| Denise | Secord | Officer-In-Charge | 03 | 30 | 2009 | 49277 | Rives Junction |
| Denise | Secord | Officer-In-Charge | | | | 49272 | Pleasant Lake |
| Denise L. | Secord | Postmaster | 11 | 12 | 2005 | 49259 | Munith (converted to a Level 6 (6-hour) remotely managed Post Office under the direction of the Postmaster of the Jackson Post Office on 06/15/2013) |
| Mrs. Maude M. | Seger | Acting Postmaster | 03 | 31 | 1945 | 49269 | Parma |
| David D. | Sell | Postmaster | 07 | 03 | 1867 | 49261 | Napoleon |
| Barbara A. | Serianni | Officer-In-Charge | 07 | 29 | 1983 | 49241 | Hanover |
| John A. | Shattuck | Postmaster | 08 | 12 | 1869 | 49246 | Horton (Baldwin’s Mills until 12/28/1871) |
| Wesley R. | Shaw | Postmaster | 05 | 08 | 1906 | | Leoni (discontinued on 04/15/1908; mail to Grass Lake) |
| John E. | Shekell | Postmaster | 03 | 17 | 1914 | 49201 | Jackson |
| Joseph P. | Shoemaker | Postmaster | 03 | 29 | 1859 | 49201 | Jackson |
| Diane E. | Shook | Officer-In-Charge | 12 | 08 | 1988 | 49263 | Norvell |
| Chester W. | Silkworth | Postmaster | 10 | 13 | 1951 | 49230 | Brooklyn |
| Theodore K. | Sims Jr. | Postmaster | 01 | 17 | 2009 | 49201 | Jackson |
| Henry | Sisson | Postmaster | 09 | 14 | 1866 | 49240 | Grass Lake |
| Genise I. | Slayton | Postmaster | 02 | 15 | 1997 | 49261 | Napoleon |
| Edwin | Smead | Postmaster | 01 | 07 | 1857 | 49246 | Horton (Baldwin’s Mills until 12/28/1871) |
| Christopher J. | Smith | Officer-In-Charge | 02 | 06 | 1997 | 49259 | Munith |
| Clarence A. | Smith | Officer-In-Charge | 12 | 29 | 1972 | 49237 | Concord |
| Clarence A. | Smith | Postmaster | 06 | 09 | 1973 | 49237 | Concord |
| Evan M. | Smith | Postmaster | 09 | 05 | 2026 | 49241 | Hanover |
| Judson C. | Smith | Postmaster | 09 | 14 | 1923 | 49254 | Michigan Center |
| Lyman B. | Smith | Postmaster | 08 | 22 | 1889 | 49241 | Hanover |
| Roger L. | Smith | Postmaster | 12 | 26 | 1992 | 49241 | Hanover |
| William | Smith | Postmaster | 10 | 08 | 1831 | 49283 | Spring Arbor |
| Alfred R. | Snyder | Postmaster | 09 | 22 | 1866 | 49246 | Horton (Baldwin’s Mills until 12/28/1871) |
| Charles L. | Snyder | Postmaster | 08 | 16 | 1893 | 49246 | Horton |
| Alpheus D. | Spencer | Postmaster | 09 | 25 | 1901 | 49283 | Spring Arbor |
| Paul | Spink | Postmaster | 04 | 05 | 1848 | 49241 | Hanover |
| Mrs. Mae R. | Sprague | Postmaster | 06 | 08 | 1915 | 49241 | Hanover |
| Walter D. | Stannard | Postmaster | 10 | 15 | 1863 | 49263 | Norvell |
| Charles W. | Stevens | Postmaster | 03 | 27 | 1907 | 49237 | Concord |
| Tallmadge | Stevens | Postmaster | 01 | 30 | 1846 | 49237 | Concord |
| Electa M. | Stewart | Postmaster | 12 | 23 | 1890 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| John | Stewart | Postmaster | 07 | 28 | 1873 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| Thomas J. | Stinson | Postmaster | 07 | 21 | 1865 | 49269 | Parma |
| Jesse B. | Stoddard | Postmaster | 07 | 13 | 1889 | 49237 | Concord |
| Janet M. | Stone | Officer-In-Charge | 01 | 29 | 1999 | 49263 | Norvell |
| Janet M. | Stone | Officer-In-Charge | 12 | 31 | 2002 | 49263 | Norvell |
| Janet M. | Stone | Postmaster | 06 | 26 | 2004 | 49263 | Norvell |
| Wilbur F. | Storey | Postmaster | 02 | 26 | 1846 | 49201 | Jackson |
| Eugene Strait | Strait | Postmaster | 05 | 03 | 1894 | | Stonypoint |
| Velma R. (Tripp) | Strait | Postmaster | 06 | 04 | 1920 | 49246 | Horton |
| Edmund B. | Sulski | Acting Postmaster | 04 | 30 | 1956 | 49261 | Napoleon |
| Edmund B. | Sulski | Postmaster | 07 | 03 | 1958 | 49261 | Napoleon |
| Timothy L. | Surbrook | Officer-In-Charge | 06 | 17 | 1988 | 49246 | Horton |
| Joel L. | Sutton | Officer-In-Charge | 01 | 08 | 1971 | 49201 | Jackson |
| Joel L. | Sutton | Postmaster | 11 | 13 | 1971 | 49201 | Jackson |
| William H. | Suylandt | Postmaster | 08 | 07 | 1894 | 49259 | Munith |
| Donald E. | Swain | Postmaster | 08 | 22 | 1981 | 49254 | Michigan Center |
| Lucille | Swain | Officer-In-Charge | 04 | 24 | 2014 | 49254 | Michigan Center |
| Lucille A. | Swain | Officer-In-Charge | 06 | 07 | 2016 | 49283 | Spring Arbor |
| Lucille A. | Swain | Postmaster | 08 | 20 | 2016 | 49283 | Spring Arbor |
| Calvin H. | Swaine | Postmaster | 07 | 28 | 1834 | 49230 | Brooklyn (Swainesville until 10/25/1836) |
| Calvin H. | Swaine | Postmaster | 10 | 25 | 1836 | 49230 | Brooklyn |
| Melissa L. | Tackett-Warner | Postmaster | 04 | 29 | 2006 | 49283 | Spring Arbor |
| Melissa L. | Tackett-Warner | Officer-In-Charge | 03 | 12 | 2019 | 49201 | Jackson |
| Harlow M. | Tanner | Postmaster | 12 | 30 | 1881 | 49246 | Horton |
| Harlow M. | Tanner | Postmaster | 08 | 21 | 1889 | 49246 | Horton |
| Morse K. | Taylor | Postmaster | 10 | 16 | 1852 | 49230 | Brooklyn |
| Henry E. | Thompson | Postmaster | 06 | 16 | 1898 | | Stonypoint (discontinued on 04/30/1902; papers to Hanover) |
| Hiram | Thompson | Postmaster | 03 | 08 | 1832 | 49201 | Jackson (Jacksonopolis until 12/08/1838) |
| Lewis J. | Thompson | Postmaster | 12 | 03 | 1845 | 49283 | Spring Arbor |
| Pamela | Thompson | Officer-In-Charge | 12 | 30 | 1987 | 49263 | Norvell |
| Le Grand B. | Thorn | Postmaster | 10 | 14 | 1870 | 49246 | Horton (Baldwin’s Mills until 12/28/1871) |
| Le Grand B. | Thorn | Postmaster | 12 | 28 | 1871 | 49246 | Horton (Baldwin’s until 02/19/1874) |
| James L. | Thorn(e) | Postmaster | 09 | 01 | 1874 | 49246 | Horton |
| Le Grand B. | Thorn(e) | Postmaster | 02 | 19 | 1874 | 49246 | Horton |
| Miss Shirley E. | Thorne | Acting Postmaster | 04 | 30 | 1959 | 49246 | Horton |
| Miss Shirley E. | Thorne | Postmaster | 05 | 31 | 1960 | 49246 | Horton |
| Frederick G. | Thurow | Officer-In-Charge | 12 | 31 | 1976 | 49284 | Springport |
| Frederick G. | Thurow | Postmaster | 04 | 08 | 1978 | 49284 | Springport |
| Rufus | Tiffany | Postmaster | 06 | 01 | 1841 | 49230 | Brooklyn |
| William | Todd | Postmaster | 01 | 02 | 1863 | 49283 | Spring Arbor |
| Amy | Tolford | Officer-In-Charge | 09 | 18 | 1997 | 49261 | Napoleon |
| Isaac D. | Toll | Postmaster | 07 | 19 | 1850 | 49254 | Michigan Center (spelled MICHIGAN CENTRE prior to the 1890s) |
| Mary M. | Tompkins | Postmaster | 12 | 06 | 1920 | 49234 | Clarklake |
| Paul H. | Totten | Acting Postmaster | 03 | 04 | 1939 | 49230 | Brooklyn |
| Paul H. | Totten | Postmaster | 01 | 20 | 1940 | 49230 | Brooklyn |
| Percy W. | Totten | Postmaster | 03 | 07 | 1922 | 49230 | Brooklyn |
| Mrs. Catherine A. | Trank | Acting Postmaster | 02 | 13 | 1937 | 49241 | Hanover |
| Mrs. Catherine A. | Trank | Acting Postmaster | 07 | 31 | 1942 | 49241 | Hanover |
| Tonya | Travioli | Officer-In-Charge | 04 | 22 | 1998 | 49261 | Napoleon |
| Alva | True | Postmaster | 12 | 07 | 1848 | 49277 | Rives Junction (West Rives until 03/12/1866) |
| Chester C. | Truss | Postmaster | 07 | 08 | 1995 | 49269 | Parma |
| Chester C. | Truss | Officer-In-Charge | | | | 49269 | Parma |
| Mrs. Kate | Turner | Acting Postmaster | 05 | 01 | 1926 | 49254 | Michigan Center |
| Mrs. Kate | Turner | Postmaster | 06 | 03 | 1926 | 49254 | Michigan Center |
| William W. | Tuttle | Postmaster | 09 | 20 | 1866 | 49263 | Norvell |
| Kimberly | Valyasek | Officer-In-Charge | 06 | 15 | 2002 | 49261 | Napoleon |
| Kimberly S. | Valyasek | Postmaster | 01 | 17 | 2009 | 49261 | Napoleon (converted to a Level 6 (6-hour) remotely managed Post Office under the direction of the Postmaster of the Brooklyn Post Office on 12/27/2014) |
| Kimberly S. | Valyasek | Postmaster | 11 | 15 | 2014 | 49254 | Michigan Center |
| Gaylord M. | Van Aken | Officer-In-Charge | 10 | 20 | 2004 | 49261 | Napoleon |
| William W. | Van Antwerp | Postmaster | 07 | 20 | 1885 | 49201 | Jackson |
| George B. | Van Etten | Postmaster | 06 | 25 | 1902 | 49254 | Michigan Center |
| Wanda G. | VanAtta | Officer-In-Charge | 10 | 06 | 1988 | 49259 | Munith |
| Tracy W. | Vaughn | Acting Postmaster | 08 | 31 | 1962 | 49201 | Jackson |
| Tracy W. | Vaughn | Postmaster | 09 | 08 | 1964 | 49201 | Jackson |
| Daniel | Walker | Postmaster | 01 | 21 | 1831 | 49240 | Grass Lake |
| Mrs. Nina I. | Wall | Postmaster | 07 | 17 | 1947 | 49269 | Parma |
| Deloris I. | Wallen | Officer-In-Charge | 04 | 17 | 1991 | 49263 | Norvell |
| Deloris I. | Wallen | Officer-In-Charge | 05 | 05 | 1993 | 49263 | Norvell |
| Deloris I. | Wallen | Postmaster | 03 | 05 | 1994 | 49263 | Norvell |
| Michael J. | Walsh | Officer-In-Charge | 01 | 28 | 1977 | 49201 | Jackson |
| David | Walton | Officer-In-Charge | 09 | 01 | 2012 | 49241 | Hanover |
| Jacob H. | Waltz | Postmaster | 09 | 04 | 1909 | | Franciso (discontinued on 01/31/1914; mail to Grass Lake) |
| Mrs. Ruth | Watson | Acting Postmaster | 01 | 01 | 1934 | 49261 | Napoleon |
| Michelle M. | Waybright | Officer-In-Charge | 01 | 18 | 2008 | 49261 | Napoleon |
| Darrell L. | Weese | Officer-In-Charge | 02 | 10 | 1978 | 49284 | Springport |
| Ernest A. | Wellman | Postmaster | 10 | 01 | 1897 | 49246 | Horton |
| Mrs. Dorothy A. | Wetzel | Acting Postmaster | 04 | 22 | 1966 | 49259 | Munith |
| Mrs. Dorothy A. | Wetzel | Postmaster | 06 | 20 | 1968 | 49259 | Munith |
| Joseph | Whelan | Officer-In-Charge | 03 | 26 | 2008 | 49240 | Grass Lake |
| Joseph P. | Whelan | Postmaster | 06 | 11 | 2005 | 49272 | Pleasant Lake |
| Karen | Wiedmeyer | Officer-In-Charge | 07 | 24 | 2012 | 49240 | Grass Lake |
| Mrs. Jean | Wildt | Acting Postmaster | 06 | 30 | 1948 | 49237 | Concord |
| Dennis R. | Williams | Postmaster | 06 | 23 | 2007 | 49230 | Brooklyn |
| Michael J. | Williams | Officer-In-Charge | 05 | 29 | 1998 | 49237 | Concord |
| Michael J. | Williams | Postmaster | 08 | 21 | 2004 | 49269 | Parma |
| Michael J. | Williams | Postmaster | 08 | 16 | 2008 | 49240 | Grass Lake |
| Vinita | Williams | Postmaster | 01 | 17 | 2009 | 49269 | Parma |
| Isaac | Winchell | Postmaster | 03 | 13 | 1867 | 49277 | Rives Junction |
| Maria | Winchell | Officer-In-Charge | 10 | 30 | 1987 | 49241 | Hanover |
| Maria | Winchell | Officer-In-Charge | 03 | 21 | 1991 | 49234 | Clarklake |
| Mrs. Gertrude L. | Winchell | Postmaster | 04 | 14 | 1925 | 49261 | Napoleon |
| Andrew | Winches | Postmaster | 08 | 24 | 1889 | 49283 | Spring Arbor |
| Jeffrey | Wolcott | Officer-In-Charge | 05 | 30 | 2002 | 49272 | Pleasant Lake |
| Jeffrey | Wolcott | Officer-In-Charge | 11 | 19 | 2012 | 49230 | Brooklyn |
| Jeffrey D. | Wolcott | Postmaster | 03 | 13 | 1999 | 49237 | Concord |
| Henry K. | Wood | Postmaster | 09 | 25 | 1872 | 49277 | Rives Junction |
| Oscar A. | Wood | Postmaster | 06 | 05 | 1913 | 49241 | Hanover |
| Ethel M. | Wood (surname changed to Southworth by marriage on 05/29/1943) | Postmaster | 03 | 16 | 1940 | 49277 | Rives Junction |
| Henry | Wooden | Postmaster | 06 | 23 | 1879 | | Stonypoint (Stony Point until 05/03/1894) |
| Theresa M. | Woods | Postmaster | 12 | 31 | 1988 | 49261 | Napoleon |
| Theresa M. | Woods | Postmaster | 11 | 02 | 1991 | 49234 | Clarklake |
| Hiel | Woodward | Postmaster | 05 | 07 | 1872 | 49230 | Brooklyn |
| George L. | Worthington | Postmaster | 11 | 05 | 1902 | 49230 | Brooklyn |
| Charles | Yarrington | Postmaster | 06 | 21 | 1880 | 49263 | Norvell |
| Charles | Yarrington | Postmaster | 05 | 03 | 1882 | 49263 | Norvell |
| Marie L. | Zenczak | Postmaster | 10 | 29 | 2005 | 49261 | Napoleon |
| William F. | Zerse | Postmaster | 11 | 27 | 1858 | | Franciso (Franciscoville until 06/18/1877) |
