| Addy Drain | 619842 | Stream | Iosco | 442102N | 0834738W | Hale SE | 797 | - | 1980-04-14 |
| Alabaster | 619883 | Populated Place | Iosco | 441111N | 0833329W | Alabaster | 591 | - | 1980-04-14 |
| Alabaster Junction | 1617406 | Populated Place | Iosco | 441445N | 0833349W | Alabaster | 614 | - | 1980-04-14 |
| Alabaster Swamp | 619884 | Swamp | Iosco | 441026N | 0833638W | Alabaster | 617 | - | 1980-04-14 |
| Alabaster Township Cemetery | | Cemetery | Iosco | 441202N | 0833313W | Alabaster | 584 | - | 1992-06-01 |
| Alabaster Whitney Drain | 619885 | Stream | Iosco | 440836N | 0833510W | Alabaster | 594 | - | 1980-04-14 |
| Alice Lake | 619957 | Lake | Iosco | 442850N | 0835054W | Hale | 889 | - | 1980-04-14 |
| Allen Lake | 619981 | Lake | Iosco | 442605N | 0832501W | Foote Site Village | 604 | - | 1980-04-14 |
| Alpena State Forest | 620019 | Forest | Alcona | 443122N | 0832945W | Mikado | 692 | - | 1980-04-14 |
| Alpena State Forest | 620020 | Forest | Alpena | 442845N | 0832115W | Oscoda | 610 | - | 2000-01-01 |
| Anderson Bayview | 620086 | Populated Place | Iosco | 441412N | 0833243W | Alabaster | 594 | - | 1980-04-14 |
| Au Gres River Roadside Park | 1617111 | Park | Iosco | 441643N | 0834301W | Floyd Lake | 751 | - | 1989-12-01 |
| Au Gres River | 1619049 | Stream | Arenac | 440142N | 0834055W | Au Gres | 581 | - | 1980-04-14 |
| Au Sable Point | 620326 | Cape | Iosco | 441949N | 0832028W | Spencer Lake | 581 | 1894 | 1980-04-14 |
| Au Sable River | 1619052 | Stream | Iosco | 442425N | 0831916W | Oscoda | 581 | 1894 | 1980-04-14 |
| Au Sable | 620323 | Populated Place | Iosco | 442439N | 0831956W | Oscoda | 591 | - | 1980-04-14 |
| AuSable River Park | 1618813 | Park | Iosco | 442417N | 0831918W | Oscoda | 581 | - | 1992-07-01 |
| Baker Creek | 620472 | Stream | Iosco | 442748N | 0834540W | Hale | 741 | - | 1980-04-14 |
| Bass Lake | 620698 | Lake | Iosco | 442015N | 0833912W | Floyd Lake | 778 | - | 1980-04-14 |
| Benson Park | 621127 | Populated Place | Iosco | 441213N | 0833316W | Alabaster | 591 | - | 1980-04-14 |
| Bright Horizons Learning Center | 1617131 | School | Iosco | 441806N | 0832541W | East Tawas | 607 | - | 1989-12-01 |
| Buchanan Creek | 622187 | Stream | Iosco | 441200N | 0834956W | Whittemore | 673 | - | 1980-04-14 |
| Buck Creek Pond | 1617106 | Lake | Iosco | 442447N | 0833420W | Sid Town | 735 | - | 1989-12-01 |
| Buck Creek | 622168 | Stream | Iosco | 442322N | 0833414W | Sid Town | 689 | - | 1980-04-14 |
| Burleigh Cemetery | | Cemetery | Iosco | 441207N | 0835034W | Whittemore | 761 | - | 1980-04-14 |
| Camp Mahn-Go-Tah-See | | Locale | Iosco | 442500N | 0834913W | Hale | 902 | - | 1980-04-14 |
| Camp Maqua | | Locale | Iosco | 442409N | 0834958W | Hale | 869 | - | 1980-04-14 |
| Camp Nissokone | | Locale | Iosco | 442841N | 0832249W | Foote Site Village | 614 | - | 1980-04-14 |
| Catherine Lake | 1619453 | Lake | Iosco | 442838N | 0835047W | Hale | 879 | - | 1980-04-14 |
| Cedar Creek Drain | 622908 | Stream | Arenac | 440714N | 0834221W | Au Gres | 597 | - | 1980-04-14 |
| Cedar Haven | 622912 | Populated Place | Iosco | 441034N | 0833345W | Alabaster | 594 | - | 1980-04-14 |
| Cedar Lake | 619758 | Lake | Alcona | 443153N | 0831955W | Greenbush | 607 | - | 1980-04-14 |
| Cedar Lake School | 1617123 | School | Iosco | 442537N | 0831956W | Oscoda | 604 | - | 1989-12-01 |
| Chain Lakes | 623037 | Lake | Iosco | 442909N | 0835058W | Hale | 902 | - | 1980-04-14 |
| Chappell Lake | 623104 | Lake | Iosco | 441935N | 0833912W | Floyd Lake | 791 | 1958 | 1980-04-14 |
| Chippewa Cemetery | | Cemetery | Iosco | 442950N | 0832624W | Foote Site Village | 676 | - | 1980-04-14 |
| City of East Tawas | 1626209 | Civil | Iosco | 441710N | 0832903W | East Tawas | 591 | - | 1995-09-01 |
| City of Whittemore | 1627270 | Civil | Iosco | 441359N | 0834810W | Whittemore | 778 | - | 1995-09-01 |
| Clark Bayshore | 623344 | Populated Place | Iosco | 441446N | 0833224W | Alabaster | 591 | - | 1980-04-14 |
| Coast Guard Dock | | Locale | Iosco | 441548N | 0832638W | East Tawas | 581 | - | 1992-06-01 |
| Cold Creek | 623560 | Stream | Iosco | 441645N | 0833044W | Tawas City | 584 | - | 1980-04-14 |
| Cooke Dam | 623747 | Dam | Iosco | 442824N | 0833416W | Sid Town | 636 | - | 1980-04-14 |
| Cooke Dam Pond | 623748 | Reservoir | Iosco | 442820N | 0833420W | Sid Town | 673 | 1964 | 1980-04-14 |
| Cooper Creek | 623785 | Stream | Iosco | 441742N | 0834334W | Floyd Lake | 709 | - | 1980-04-14 |
| Coppler Creek | 623814 | Stream | Iosco | 443022N | 0832405W | Mikado | 597 | - | 1980-04-14 |
| County Line Drain | 623889 | Stream | Iosco | 440938N | 0834245W | National City | 610 | - | 1980-04-14 |
| Crainer Creek | 623954 | Stream | Iosco | 441126N | 0835125W | Whittemore | 696 | - | 1980-04-14 |
| Crowell Swamp | 624145 | Swamp | Iosco | 441146N | 0833606W | Alabaster | 633 | - | 1980-04-14 |
| Dead Creek | 624407 | Stream | Iosco | 441556N | 0833121W | Tawas City | 581 | - | 1980-04-14 |
| Dewey Durant Park | 1617135 | Park | Iosco | 441709N | 0832955W | East Tawas | 587 | - | 1989-12-01 |
| Dry Creek | 624897 | Stream | Iosco | 442858N | 0832307W | Foote Site Village | 604 | - | 1980-04-14 |
| Duell Lake | 624964 | Lake | Iosco | 442610N | 0832125W | Oscoda | 584 | 1958 | 1980-04-14 |
| Duval Creek | 625044 | Stream | Alcona | 443242N | 0832450W | Mikado | 594 | 1957 | 1980-04-14 |
| East Branch Au Gres River | 625123 | Stream | Arenac | 440838N | 0833403W | Alabaster | 581 | 1968 | 1980-04-14 |
| East Tawas | 625264 | Populated Place | Iosco | 441646N | 0832925W | East Tawas | 584 | - | 1980-04-14 |
| Elm Creek | 1619847 | Stream | Iosco | 441011N | 0834243W | National City | 614 | - | 1980-04-14 |
| Esmond Lake | 1619868 | Lake | Iosco | 442246N | 0834557W | Hale | 801 | - | 1980-04-14 |
| Fellow Marine Sales | | Locale | Iosco | 442432N | 0831934W | Oscoda | 581 | - | 1992-06-01 |
| Five Channels Dam | 626106 | Dam | Iosco | 442718N | 0834036W | Loud Dam | 705 | - | 1980-04-14 |
| Five Channels Dam Pond | 626107 | Reservoir | Iosco | 442715N | 0834040W | Loud Dam | 705 | 1964 | 1980-04-14 |
| Floyd Lake | 626196 | Lake | Iosco | 441950N | 0834000W | Floyd Lake | 778 | 1958 | 1980-04-14 |
| Foote Dam | 626217 | Dam | Iosco | 442609N | 0832627W | Foote Site Village | 627 | - | 1980-04-14 |
| Foote Dam Pond | 626218 | Reservoir | Iosco | 442610N | 0832624W | Foote Site Village | 594 | 1964 | 1980-04-14 |
| Foote Site Village | 626220 | Populated Place | Iosco | 442536N | 0832641W | Foote Site Village | 643 | - | 1980-04-14 |
| Fountain Creek | 626326 | Stream | Iosco | 442054N | 0832931W | East Tawas | 600 | - | 1980-04-14 |
| Gateway Park | 1617129 | Park | Iosco | 441534N | 0833134W | Tawas City | 584 | - | 1989-12-01 |
| Goose Lake | 626971 | Lake | Iosco | 442914N | 0834312W | Loud Dam | 810 | - | 1980-04-14 |
| Gordon Creek | 626990 | Stream | Iosco | 442346N | 0833529W | Sid Town | 715 | - | 1980-04-14 |
| Graham Creek | 627068 | Stream | Iosco | 442057N | 0833908W | Floyd Lake | 781 | - | 1980-04-14 |
| Grassy Lake | 627228 | Lake | Iosco | 443020N | 0834620W | Alcona Dam Pond | 850 | - | 1980-04-14 |
| Gray Creek | 627257 | Stream | Iosco | 441920N | 0832950W | East Tawas | 584 | 1958 | 1980-04-14 |
| Great Lakes | 1783507 | Lake | Cheboygan | 454115N | 0842615W | Cheboygan | 581 | - | 1998-03-05 |
| Greenwood Cemetery | | Cemetery | Iosco | 441722N | 0832745W | East Tawas | 597 | - | 1980-04-14 |
| Guiley Creek | 627502 | Stream | Iosco | 441838N | 0834323W | Floyd Lake | 718 | - | 1980-04-14 |
| Guiley Pond | 627503 | Lake | Iosco | 441856N | 0834315W | Floyd Lake | 722 | - | 1980-04-14 |
| Guilford Lake | 1620096 | Lake | Iosco | 442858N | 0835253W | South Branch | 925 | 1958 | 1980-04-14 |
| Hale Cemetery | | Cemetery | Iosco | 442245N | 0834619W | Hale | 830 | - | 1980-04-14 |
| Hale Creek | 1620108 | Stream | Iosco | 442040N | 0834450W | Floyd Lake | 755 | - | 1980-04-14 |
| Hale Lake | 1620109 | Lake | Iosco | 442248N | 0834946W | Hale | 833 | - | 1980-04-14 |
| Hale Lookout Tower | 1623388 | Tower | Iosco | 441840N | 0834817W | Hale SE | 843 | - | 1980-04-14 |
| Hale Plainfield Township park Campground and Picnic Area | | Locale | Iosco | 442410N | 0834933W | Hale | 850 | - | 1992-08-01 |
| Hale | 627611 | Populated Place | Iosco | 442240N | 0834817W | Hale | 856 | - | 1980-04-14 |
| Hall Creek | 627640 | Stream | Iosco | 441255N | 0834735W | Whittemore | 689 | - | 1980-04-14 |
| Hemlock | 1617110 | Populated Place | Iosco | 441641N | 0834214W | Floyd Lake | 738 | - | 1989-12-01 |
| Hemlock Road Church | | Church | Iosco | 441642N | 0833838W | Floyd Lake | 702 | - | 1980-04-14 |
| Hill Creek | 628275 | Stream | Alcona | 443031N | 0832407W | Mikado | 584 | - | 1980-04-14 |
| Hope Creek | 1620241 | Stream | Iosco | 441616N | 0834932W | Hale SE | 722 | - | 1980-04-14 |
| Hoppy Creek | 628584 | Stream | Alcona | 443012N | 0834843W | Alcona Dam Pond | 823 | - | 1980-04-14 |
| Hoppy Lake | 1620242 | Lake | Iosco | 443008N | 0834938W | Alcona Dam Pond | 853 | - | 1980-04-14 |
| Hubble Creek | 628750 | Stream | Iosco | 442738N | 0835142W | Hale | 883 | - | 1980-04-14 |
| Huron Church | | Church | Iosco | 442752N | 0831950W | Oscoda | 600 | - | 1989-12-01 |
| Huron National Forest | 1623765 | Forest | Iosco | 442115N | 0832115W | Spencer Lake | 600 | - | 1989-12-01 |
| Huron Oaks | 628871 | Populated Place | Iosco | 441337N | 0833300W | Alabaster | 594 | - | 1980-04-14 |
| Hyde Park | 628906 | Populated Place | Iosco | 441301N | 0833310W | Alabaster | 591 | - | 1980-04-14 |
| Iargo Springs | 1617104 | Spring | Iosco | 442630N | 0834030W | Loud Dam | 686 | - | 1989-12-01 |
| Indian Creek | 628974 | Stream | Iosco | 442357N | 0832904W | Foote Site Village | 636 | - | 1980-04-14 |
| Indian Lake | 628991 | Lake | Iosco | 442050N | 0833858W | Floyd Lake | 781 | - | 1980-04-14 |
| Iosco County Airport | 1623882 | Airport | Iosco | 441846N | 0832520W | East Tawas | 607 | - | 1994-09-01 |
| Iosco County | 1622977 | Civil | Iosco | 442000N | 0833800W | Floyd Lake | 784 | - | 1993-02-01 |
| Iosco Post Office (historical) | 1926664 | Post Office | Iosco | Unknown | Unknown | Unknown | - | - | 2001-06-26 |
| Ipperwash Scarp | 1625561 | Bar | Iosco | 440902N | 0833645W | Alabaster | 607 | - | 1992-06-01 |
| Island Lake | 629108 | Lake | Iosco | 442021N | 0833834W | Floyd Lake | 774 | - | 1980-04-14 |
| Jerry's Marina | | Locale | Iosco | 441550N | 0832621W | East Tawas | 581 | - | 1992-06-01 |
| Johns Creek | 629317 | Stream | Iosco | 441508N | 0833450W | Tawas City | 597 | - | 1980-04-14 |
| Johnson Creek | 629327 | Stream | Iosco | 441142N | 0834546W | Whittemore | 630 | - | 1980-04-14 |
| Johnson Creek Cemetery | | Cemetery | Iosco | 441215N | 0834815W | Whittemore | 712 | - | 1980-04-14 |
| Jose Lake | 1620388 | Lake | Iosco | 442856N | 0834939W | Hale | 883 | - | 1980-04-14 |
| Kelchner Drain | 629510 | Stream | Iosco | 440902N | 0834224W | National City | 610 | - | 1980-04-14 |
| Kendall Marsh | 629578 | Swamp | Iosco | 441338N | 0833528W | Alabaster | 636 | - | 1980-04-14 |
| Kunze Creek | 629891 | Stream | Iosco | 441910N | 0832821W | East Tawas | 581 | 1958 | 1980-04-14 |
| Laidlaw Cemetery | | Cemetery | Iosco | 441823N | 0833602W | Tawas City | 755 | - | 1980-04-14 |
| Lake Huron Beach | 629977 | Populated Place | Iosco | 441359N | 0833251W | Alabaster | 591 | - | 1980-04-14 |
| Lake Huron | 1624619 | Lake | Huron | 440500N | 0824730W | Huron City | 581 | - | 1980-04-14 |
| Lake Solitude | 638236 | Lake | Iosco | 441658N | 0832644W | East Tawas | 584 | - | 1980-04-14 |
| Latter Creek | 630185 | Stream | Iosco | 441538N | 0834732W | Hale SE | 692 | - | 1980-04-14 |
| Lime Creek | 1620516 | Stream | Iosco | 442910N | 0835138W | Hale | 902 | - | 1980-04-14 |
| Lincoln Junction | 1617683 | Populated Place | Iosco | 442933N | 0832112W | Oscoda | 617 | - | 1980-04-14 |
| Little Bass Lake | 1620530 | Lake | Iosco | 442401N | 0834555W | Hale | 833 | - | 1980-04-14 |
| Little Island Lake | 630647 | Lake | Iosco | 442013N | 0834014W | Floyd Lake | 778 | - | 1980-04-14 |
| Little Long Lake | 630685 | Lake | Iosco | 442422N | 0835118W | Hale | 896 | - | 1980-04-14 |
| Londo Lake | 1620606 | Lake | Iosco | 442055N | 0835210W | Hale SE | 876 | 1958 | 1980-04-14 |
| Long Lake | 1620610 | Lake | Iosco | 442454N | 0835114W | Hale | 906 | - | 1980-04-14 |
| Long Lake | 1620611 | Populated Place | Iosco | 442511N | 0835219W | Hale | 919 | - | 1980-04-14 |
| Loon Lake | 1620619 | Lake | Iosco | 442435N | 0834925W | Hale | 850 | - | 1980-04-14 |
| Lost Lake | 631089 | Lake | Iosco | 442200N | 0833609W | Tawas City | 745 | - | 1980-04-14 |
| Loud Creek | 631124 | Stream | Iosco | 442357N | 0832906W | Foote Site Village | 636 | - | 1980-04-14 |
| Loud Dam | 1617105 | Dam | Iosco | 442752N | 0834318W | Loud Dam | 741 | - | 1989-12-01 |
| Loud Dam Pond | 631125 | Reservoir | Iosco | 442748N | 0834320W | Loud Dam | 741 | 1964 | 1980-04-14 |
| Loud Island | 631126 | Island | Iosco | 442855N | 0832223W | Oscoda | 591 | - | 1980-04-14 |
| Lumbermens Monument Visitor Center | | Locale | Iosco | 442607N | 0833723W | Sid Town | 823 | - | 2000-01-01 |
| Maggie Creek | 1620666 | Stream | Iosco | 442459N | 0834900W | Hale | 850 | - | 1980-04-14 |
| Manary Creek | 631373 | Stream | Iosco | 441522N | 0834133W | Floyd Lake | 679 | - | 1980-04-14 |
| Marlbed Lake | 1620710 | Lake | Iosco | 442831N | 0835224W | Hale | 902 | 1958 | 1980-04-14 |
| Mason Creek | 631700 | Stream | Iosco | 441158N | 0833314W | Alabaster | 584 | - | 1980-04-14 |
| McIvor | 631927 | Populated Place | Iosco | 441404N | 0834059W | National City | 666 | - | 1980-04-14 |
| McMullen Drain | 632001 | Stream | Iosco | 441038N | 0833848W | National City | 614 | - | 1980-04-14 |
| Meadow | 1617109 | Populated Place | Iosco | 441552N | 0833837W | Floyd Lake | 679 | - | 1989-12-01 |
| Memory Gardens Cemetery | | Cemetery | Iosco | 441602N | 0833205W | Tawas City | 600 | - | 1989-12-01 |
| Messer Swamp | 632158 | Swamp | Iosco | 441351N | 0833809W | National City | 653 | - | 1980-04-14 |
| Mitchell Creek | 632511 | Stream | Iosco | 441900N | 0834351W | Floyd Lake | 725 | - | 1980-04-14 |
| Mitchell Lake | 632515 | Lake | Iosco | 442900N | 0834356W | Loud Dam | 774 | - | 1980-04-14 |
| Mongo Creek | 632567 | Stream | Iosco | 441144N | 0834548W | Whittemore | 630 | - | 1980-04-14 |
| Monument Campground | | Locale | Iosco | 442603N | 0833713W | Sid Town | 827 | - | 1989-12-01 |
| Mud Lake | 1620934 | Lake | Iosco | 442404N | 0834627W | Hale | 843 | - | 1980-04-14 |
| Mud Lake | 1620935 | Lake | Iosco | 442415N | 0835239W | South Branch | 883 | - | 1980-04-14 |
| Mud Lake | 632994 | Lake | Iosco | 442455N | 0834831W | Hale | 840 | - | 1980-04-14 |
| National City | 633225 | Populated Place | Iosco | 441403N | 0834324W | National City | 676 | - | 1980-04-14 |
| Oak Wood Shores | 633864 | Populated Place | Iosco | 441242N | 0833313W | Alabaster | 591 | - | 1980-04-14 |
| Old Au Sable River | 620329 | Stream | Iosco | 442237N | 0831958W | Oscoda | 581 | - | 2000-01-01 |
| Old Orchard Park | 634010 | Park | Iosco | 442636N | 0832847W | Foote Site Village | 650 | - | 1980-04-14 |
| Oscoda | 634132 | Populated Place | Iosco | 442513N | 0831951W | Oscoda | 591 | - | 1980-04-14 |
| Oscoda High School | 1617125 | School | Iosco | 442527N | 0832238W | Foote Site Village | 617 | - | 1989-12-01 |
| Oscoda Indian Mission | | Church | Alcona | 443040N | 0832631W | Mikado | 663 | - | 1980-04-14 |
| Oscoda Yacht Club | | Locale | Iosco | 442434N | 0831937W | Oscoda | 581 | - | 1992-06-01 |
| Oscoda-Wurtsmith Airport | 1624091 | Airport | Iosco | 442709N | 0832249W | Foote Site Village | 620 | - | 1994-09-01 |
| Parent Drain | 634364 | Stream | Iosco | 441038N | 0833848W | National City | 614 | - | 1980-04-14 |
| Perch Lake | 634631 | Lake | Iosco | 442925N | 0834330W | Loud Dam | 823 | - | 1980-04-14 |
| Peterson Lake | 1621219 | Lake | Ogemaw | 442527N | 0835258W | South Branch | 906 | - | 1980-04-14 |
| Phelan Creek | 634750 | Stream | Iosco | 442805N | 0832103W | Oscoda | 587 | - | 1980-04-14 |
| Picket Creek | 634804 | Stream | Iosco | 441942N | 0834259W | Floyd Lake | 751 | - | 1980-04-14 |
| Pine River | 634987 | Stream | Iosco | 442938N | 0832316W | Foote Site Village | 587 | - | 1980-04-14 |
| Pioneer Cemetery | | Cemetery | Iosco | 441847N | 0834143W | Floyd Lake | 787 | - | 1989-12-01 |
| Plainfield Park | 1621256 | Park | Iosco | 442408N | 0834931W | Hale | 886 | - | 1980-04-14 |
| Porterfield Creek | 1621299 | Stream | Iosco | 441501N | 0834707W | Hale SE | 679 | - | 1980-04-14 |
| Proper Creek | 635475 | Stream | Iosco | 441448N | 0833542W | Alabaster | 614 | - | 1980-04-14 |
| Reno Cemetery | | Cemetery | Iosco | 441546N | 0834702W | Hale SE | 764 | - | 1980-04-14 |
| Reno Church | | Church | Iosco | 441728N | 0834701W | Hale SE | 797 | - | 1980-04-14 |
| Richardson School | 1617127 | School | Iosco | 442522N | 0832257W | Foote Site Village | 617 | - | 1989-12-01 |
| River Lakes | 1621396 | Lake | Iosco | 442704N | 0835247W | South Branch | 886 | - | 1980-04-14 |
| River Road School | 1617126 | School | Iosco | 442528N | 0832255W | Foote Site Village | 620 | - | 1989-12-01 |
| Roadside Chapel | | Church | Iosco | 442629N | 0834817W | Hale | 951 | - | 1980-04-14 |
| Rollways Campground | | Locale | Iosco | 442743N | 0834624W | Hale | 873 | - | 1992-08-01 |
| Rollways Lookout Tower | 1623605 | Tower | Iosco | 442714N | 0834402W | Loud Dam | 866 | - | 1980-04-14 |
| Rollways Picnic Area | | Locale | Iosco | 442729N | 0834616W | Hale | 869 | - | 1992-08-01 |
| Round Lake | 636304 | Lake | Iosco | 442022N | 0833936W | Floyd Lake | 781 | - | 1980-04-14 |
| Round Lake Campground | | Locale | Iosco | 442037N | 0833940W | Floyd Lake | 801 | - | 1989-12-01 |
| Roy Creek | 636350 | Stream | Alcona | 443305N | 0832602W | Mikado | 607 | - | 1980-04-14 |
| Sacred Heart Church | | Church | Iosco | 442606N | 0831943W | Oscoda | 587 | - | 1989-12-01 |
| Saddler Creek | 636484 | Stream | Iosco | 441314N | 0833901W | National City | 640 | - | 1980-04-14 |
| Saginaw Bay | 636499 | Bay | Bay | 434500N | 0834000W | Standish | 581 | - | 1980-04-14 |
| Saint Johns Church | | Church | Iosco | 442457N | 0831933W | Oscoda | 584 | - | 1989-12-01 |
| Saint Pius X Church | | Church | Iosco | 442318N | 0834821W | Hale | 869 | - | 1980-04-14 |
| Sand Creek | 637170 | Stream | Iosco | 441226N | 0833853W | National City | 630 | - | 1980-04-14 |
| Sand Lake | 637188 | Lake | Iosco | 441932N | 0834051W | Floyd Lake | 774 | - | 1980-04-14 |
| Sand Lake | 637195 | Populated Place | Iosco | 441909N | 0834105W | Floyd Lake | 791 | - | 1980-04-14 |
| Sawyer Canoe Company | | Locale | Iosco | 442444N | 0831942W | Oscoda | 581 | - | 1992-06-01 |
| Secord Lake | 1621556 | Lake | Iosco | 442619N | 0835245W | South Branch | 886 | - | 1980-04-14 |
| Sevenmile Hill Lookout Tower | 1623620 | Tower | Iosco | 442700N | 0832551W | Foote Site Village | 712 | - | 1980-04-14 |
| Sherman School | 637772 | School | Iosco | 441218N | 0834159W | National City | 636 | - | 1980-04-14 |
| Sherman Townhall | | Locale | Iosco | 441221N | 0834135W | National City | 633 | - | 1992-06-01 |
| Sherrit Drain | 637776 | Stream | Iosco | 441011N | 0834243W | National City | 614 | - | 1980-04-14 |
| Sid Town | 1617117 | Populated Place | Iosco | 442707N | 0833622W | Sid Town | 751 | - | 1989-12-01 |
| Silver Creek | 637927 | Stream | Iosco | 441932N | 0832853W | East Tawas | 581 | - | 2000-01-01 |
| Silver Creek Lookout Tower (historical) | | Tower | Iosco | 442235N | 0833558W | Sid Town | 804 | - | 2000-01-01 |
| Silver Valley Campground | | Locale | Iosco | 442239N | 0833607W | Sid Town | 725 | - | 1989-12-01 |
| Sims Creek | 637993 | Stream | Iosco | 441829N | 0833012W | Tawas City | 584 | - | 1980-04-14 |
| Skeel Spur | | Locale | Iosco | 442613N | 0832046W | Oscoda | 591 | - | 1989-12-01 |
| Slab Lake | 638079 | Lake | Iosco | 442948N | 0834359W | Loud Dam | 833 | - | 1980-04-14 |
| Smith Creek | 1621651 | Stream | Iosco | 441835N | 0834325W | Floyd Lake | 715 | - | 1980-04-14 |
| South Branch River | 1621694 | Stream | Iosco | 442905N | 0834645W | Hale | 768 | 1959 | 1980-04-14 |
| South Branch Trailcamp | | Locale | Iosco | 442913N | 0834747W | Hale | 846 | - | 1992-08-01 |
| South Dease Lake | 1621699 | Lake | Iosco | 442323N | 0835350W | South Branch | 860 | - | 1980-04-14 |
| Spencer Lake | 638501 | Lake | Iosco | 442012N | 0832117W | Spencer Lake | 584 | - | 1980-04-14 |
| Stanton Creek | 638727 | Stream | Iosco | 442318N | 0833457W | Sid Town | 699 | - | 1980-04-14 |
| State Ditch | 638758 | Canal | Iosco | 442409N | 0832255W | Foote Site Village | 614 | - | 1980-04-14 |
| State of Michigan | 1779789 | Civil | Wexford | 441501N | 0853001W | Boon | 1293 | 1954 | 1998-02-06 |
| Stewart Creek | 1621774 | Stream | Iosco | 443024N | 0834805W | Alcona Dam Pond | 774 | - | 1980-04-14 |
| Stuart Lake | 1621802 | Lake | Iosco | 442955N | 0834544W | Hale | 810 | - | 1980-04-14 |
| Tawa Beach Post Office (historical) | 1926608 | Post Office | Iosco | 441640N | 0832710W | East Tawas | 587 | - | 2001-06-26 |
| Tawas Bay | 1614604 | Bay | Iosco | 441600N | 0832900W | East Tawas | 581 | 1894 | 1980-04-14 |
| Tawas Bay Yacht Club | | Locale | Iosco | 441545N | 0832632W | East Tawas | 581 | - | 1992-06-01 |
| Tawas Beach Club | | Locale | Iosco | 441637N | 0832712W | East Tawas | 581 | - | 1992-06-01 |
| Tawas City | 1614605 | Populated Place | Iosco | 441610N | 0833053W | Tawas City | 591 | - | 1980-04-14 |
| Tawas City | 1627152 | Civil | Iosco | 441602N | 0833119W | Tawas City | 581 | - | 1995-09-01 |
| Tawas Golf Course | | Locale | Iosco | 441830N | 0833158W | Tawas City | 614 | - | 2007-02-08 |
| Tawas Lake | 1614606 | Lake | Iosco | 441848N | 0832909W | East Tawas | 581 | 1912 | 1980-04-14 |
| Tawas Light | | Locale | Iosco | 441513N | 0832658W | East Tawas | 584 | - | 1992-06-01 |
| Tawas Point | 1614607 | Cape | Iosco | 441455N | 0832730W | East Tawas OE S | 584 | 1894 | 1980-04-14 |
| Tawas Point State Park | 1617132 | Park | Iosco | 441520N | 0832646W | East Tawas | 581 | - | 1989-12-01 |
| Tawas River | 1614608 | Stream | Iosco | 441531N | 0833134W | Tawas City | 581 | - | 1980-04-14 |
| The Jackpines | 1621891 | Populated Place | Iosco | 442713N | 0834753W | Hale | 889 | - | 1980-04-14 |
| Thompson Cemetery | | Cemetery | Iosco | 442919N | 0834822W | Hale | 873 | - | 1980-04-14 |
| Timbers Sky Camp Airport | 1624157 | Airport | Iosco | 442810N | 0835254W | South Branch | 935 | - | 1994-09-01 |
| Tom Dillon Park | 1617133 | Park | Iosco | 441718N | 0832917W | East Tawas | 591 | - | 1989-12-01 |
| Township of Alabaster | 1625808 | Civil | Iosco | 441132N | 0833606W | Alabaster | 633 | - | 1995-09-01 |
| Township of Au Sable | 1625865 | Civil | Iosco | 442250N | 0832202W | Oscoda | 610 | - | 1995-09-01 |
| Township of Baldwin | 1625876 | Civil | Iosco | 441917N | 0832823W | East Tawas | 584 | - | 1995-09-01 |
| Township of Burleigh | 1626003 | Civil | Iosco | 441200N | 0834917W | Whittemore | 705 | - | 1995-09-01 |
| Township of Grant | 1626380 | Civil | Iosco | 441736N | 0834138W | Floyd Lake | 748 | - | 1995-09-01 |
| Township of Oscoda | 1626864 | Civil | Iosco | 442820N | 0833243W | Sid Town | 771 | - | 1995-09-01 |
| Township of Plainfield | 1626911 | Civil | Iosco | 442414N | 0834712W | Hale | 850 | - | 1995-09-01 |
| Township of Reno | 1626963 | Civil | Iosco | 441721N | 0834913W | Hale SE | 814 | - | 1995-09-01 |
| Township of Sherman | 1627072 | Civil | Iosco | 441203N | 0834151W | National City | 633 | - | 1995-09-01 |
| Township of Tawas | 1627151 | Civil | Iosco | 441651N | 0833552W | Tawas City | 686 | - | 1995-09-01 |
| Township of Wilber | 1627271 | Civil | Iosco | 442259N | 0833106W | Sid Town | 692 | - | 1995-09-01 |
| Trinity Church | | Church | Iosco | 442647N | 0831958W | Oscoda | 604 | - | 1989-12-01 |
| Turtle | 1617904 | Populated Place | Iosco | 441127N | 0834433W | National City | 640 | - | 1980-04-14 |
| Tuttle Ditch | 1618127 | Canal | Iosco | 442045N | 0832853W | East Tawas | 594 | - | 1991-07-01 |
| Tuttle Marsh National Wildlife Area | 1617134 | Park | Iosco | 442200N | 0832730W | East Tawas | 607 | - | 1989-12-01 |
| U.S. Gypsum Company | | Locale | Iosco | 441104N | 0833329W | Alabaster | 587 | - | 1992-06-01 |
| Van Etten Creek | 1615471 | Stream | Iosco | 442540N | 0832038W | Oscoda | 587 | - | 1980-04-14 |
| Van Etten Lake | 1615473 | Lake | Iosco | 442820N | 0832135W | Oscoda | 587 | 1958 | 1980-04-14 |
| Vaughn Creek | 1615528 | Stream | Iosco | 441943N | 0834301W | Floyd Lake | 738 | - | 1980-04-14 |
| Vaughn Lake | 1615529 | Lake | Iosco | 442208N | 0834253W | Floyd Lake | 804 | - | 1980-04-14 |
| WCLS-FM (Oscoda) | 1625462 | Tower | Iosco | 442032N | 0832219W | Spencer Lake | 604 | - | 1994-09-01 |
| WDBI-FM (Tawas City) | 1625513 | Tower | Iosco | 441627N | 0833942W | Floyd Lake | 709 | - | 1994-09-01 |
| Weavers Marina | | Locale | Iosco | 442426N | 0831933W | Oscoda | 581 | - | 1992-06-01 |
| Welcome Lake | 1622077 | Lake | Iosco | 442347N | 0834543W | Hale | 833 | - | 1980-04-14 |
| West Londo Lake | 1622116 | Lake | Iosco | 442115N | 0835245W | Sage Lake | 883 | 1958 | 1980-04-14 |
| White Rock | 1617940 | Populated Place | Iosco | 441509N | 0834102W | Floyd Lake | 682 | - | 1980-04-14 |
| Whitney Creek | 1616391 | Stream | Iosco | 441131N | 0835112W | Whittemore | 692 | - | 1980-04-14 |
| Whittemore | 1616402 | Populated Place | Iosco | 441401N | 0834811W | Whittemore | 778 | - | 1980-04-14 |
| Whittemore-Prescott High School | 1616403 | School | Ogemaw | 441343N | 0835259W | Prescott | 801 | - | 1980-04-14 |
| Wilber | 1616427 | Populated Place | Iosco | 442323N | 0832916W | Foote Site Village | 659 | - | 1980-04-14 |
| Wilber Cemetery | | Cemetery | Iosco | 442213N | 0833103W | Tawas City | 696 | - | 1980-04-14 |
| Wilber Church | | Church | Iosco | 442232N | 0833046W | Sid Town | 692 | - | 1980-04-14 |
| Wildcat Creek | 1616445 | Stream | Iosco | 442741N | 0833304W | Sid Town | 640 | - | 1980-04-14 |
| WIOS-AM (Tawas City-East Tawas) | 1625316 | Tower | Iosco | 441548N | 0833242W | Tawas City | 594 | - | 1994-09-01 |
| WKJC-FM (Tawas City) | 1625514 | Tower | Iosco | 442443N | 0833717W | Sid Town | 820 | - | 1994-09-01 |
| Wrights Lake | 1616847 | Lake | Iosco | 442238N | 0833500W | Sid Town | 735 | - | 1980-04-14 |
| Wurtsmith Air Force Base (historical) | 2090479 | Military (Historical) | Iosco | 442709N | 0832249W | Foote Site Village | 620 | - | 2006-07-17 |
| Yankee Reef | 1625117 | Bar | Iosco | 442859N | 0833330W | Sid Town | 817 | - | 1991-06-01 |
| Zion Cemetery | | Cemetery | Iosco | 441708N | 0833305W | Tawas City | 630 | - | 1989-12-01 |