There were 59 seniors in the school's "Golden Year" graduating class on June 2, 1979, commerating 50 years since the establishment of St. Mary's High School.
St. Mary's Graduating Class Roster of 1979
| Beulieu, Denise Michele |
| Beachnau, Gregory J. |
| Borowiak, Gary |
| Borowiak, John |
| Burzynski, Barbara Marie |
| Comella, Mark Thomas |
| Crant, Melody Leah |
| Crawford, Lawrence Andrew |
| Czinki, Cynthia |
| DeJesus, J. Michael |
| Dreffs, Janet M. |
| Dobrzelewski, Mark |
| Francis, Sharon Marie |
| Gapinski, Michael |
| Jasinski, Renee Marie |
| Kirt, William |
| Knight, William James |
| Koscielniak, Matthew |
| Koscielniak, Mary Leone |
| Kosiara, Michael Anthony |
| Kurkowski, Simon Michael |
| LeBlanc, Paatrick Jerome |
| Lenartowicz, Thomas |
| Lochinski, Patrick Joseph |
| Lompra, Valerie |
| Lovelace, Scott |
| Lorenzo, Amelia |
| Mackowiak, Edward L. |
| Mankowski, Mary Jo |
| Mankowski, Teri Lynn |
| Manuszak, Karen Ann |
| Matuszak, Michelle Lynne |
| Maxwell, J. Kevin |
| Mellon, Curtis A. |
| Morris, Susan Mary |
| Muzyl, Bill |
| Newman, John Henry |
| Osantowski, Gary Gordon |
| Pandell, Eric A. |
| Prusakiewicz, Kathleen Gail |
| Prusakiewicz, Randall J. |
| Pung, Douglas S. |
| Purgiel, Daniel C. |
| Pytloweany, Francis Walter II |
| Richardson, Diane M. |
| Rider, Dan |
| Roberts, Linda Jean |
| Skop, Kenneth Duane |
| Slivinski, Mary Jo |
| Slivinski, Sandra Marie |
| Smith, Noreen Marie |
| Stanloski, Rene' |
| Stutesman, Dave |
| Switalski, Louise Francis |
| Tobin, Jeffery Paul |
| Tubbesing, Gerrit |
| Walsh, Elizabeth Ann |
| Woodcock, Susan Elizabeth |
| Zaremba, Carrie Anne |