| | Norris | Francis Lee (Vet, US Army Korea) | 1928-08-20 | 2016-08-20 | 2016-08-07 | GM-A,6,1 | Halbritter |
| | Nowak | Vern (Vet) | 1885-00-00 | 1920-10-07 | 1920-10-04 | NEW-67,49,1 | Augustine |
| | Nowicki | Thomas Edward (Veteran) | 1955-01-27 | 2021-09-24 | 2021-09-21 | GM-E,123,4 | Halbritter-Wickens |
| | Nyborg | Henry Louis (Vet, US Army WWII) | 1908-05-11 | 1967-02-09 | 1967-02-05 | GM-G,156,3 | Pifer |
| | Oberlink | William (Vet, WWI) | 1891-01-14 | 1966-01-14 | 1966-01-10 | GM-VET,26 | Pifer |
| | Obstfeld | Aaron D. (Vet, US Navy, Persian Gulf) | 1973-10-26 | 2004-10-20 | 2004-09-22 | GM-K,272,A2 | Hoven |
| | O'Connell | Jesse D. (US Army WWI) | 1886-09-28 | 1930-12-05 | 1930-12-03 | NEW-63,45,1 | Augustine |
| | Odiorne | Dolph Pearl Jr. (Vet, WWII) | 1923-09-01 | 0000-00-00 | 1944-05-01 | NEW-58,32,8A | |
| | Odiorne | Dolph Pearl Sr. (Vet) | 1886-00-00 | 1964-06-08 | 1964-06-05 | NEW-58,32,7 | Bowerman |
| | Ogden | Earl D. (Veteran) | 1932-05-19 | 2013-05-15 | 2013-05-11 | NEW-64,84,1 | Halbritter |
| | O'Gorman | Thomas (Vet) | 1890-00-00 | 1941-06-05 | 1941-06-03 | GM-C,156,1 | Pifer |
| | Okerbloom | Donald (Vet, US Army, Korea) | 1930-01-19 | 2002-12-27 | 2002-12-26 | GM-VET,193 | Pifer-Smith |
| | Okerbloom | Gary Eugene (Vet, US Marines, Vietnam) | 1948-02-11 | 1992-05-22 | 1992-05-20 | GM-VET,134 | Smith |
| | Okonski | William, Sr. (Vet, US Army WWII) | 1925-10-19 | 1997-04-30 | 1997-04-27 | NEW-54,21,1 | Halbritter |
| | Oleson | Robert Nichols (Veteran) | 1920-11-11 | 1972-12-08 | 1972-12-03 | GM-G,87,4 | Pifer |
| | Olson | Robert W. (Vet, US Navy, WWII) | 1923-03-17 | 1974-07-24 | 1974-07-21 | GM-VET,107 | Halbritter |
| | Olson | Willmar Edgar (Vet) | 1921-07-08 | 1959-12-22 | 1959-12-19 | GM-G,13,1 | Pifer |
| | Onderdonk | Howard C. (Vet, US Army, WWII Korea) | 1928-04-15 | 2010-10-20 | 2010-10-16 | GM-K,32,1 | Halbritter |
| | Opfer | Paul Gordon (Vet, US Navy, Vietnam) | 1953-09-28 | 2001-09-17 | 2001-08-22 | GM-VET85,2 | Halbritter |
| | Orias | John P. (Vet, US Navy, WWII) | 1923-01-23 | 1985-11-25 | 1985-11-22 | GM-VET,178 | Halbritter |
| | Orr | Arthur (Vet, US Army, WWI) | 1894-05-03 | 1975-02-03 | 1975-01-31 | GM-U,26,2 | |
| | Orr | James W. Dr. (Vet) | 1821-00-00 | 1888-09-08 | 1888-09-06 | CITY-63,1,4 | |
| | Ortmann | William Henry (US Army) | 1927-08-05 | 2019-11-13 | 2019-11-04 | GM-VET,210,1 | Brown |
| | Ossmer | Daniel D. (Vet, US Marines, Air Wing, WWII) | 1921-03-05 | 1950-10-28 | 1950-10-25 | GM-P,233,1 | Pifer |
| | Ossmer | Jack Lee (Vet, US Army) | 1945-02-04 | 1995-02-10 | 1995-02-06 | GM-K,56,4 | Smith |