- Oliver, Louise — 1918 to 2012
- Orman, Jesse Nathaniel Lee — 2026 to 2026
- Osborne, Mary Elizabeth — 1946 to 2012
- Osburn, Dorothy Lou — 1940 to 2025
- Osburn, Linda Annette — 1953 to 2026
- Osburn, Arthur Randall — 1922 to 1943
- O’Grady, Jessika Coral — 1977 to 2026
- Owens, Barbara Ann — 1951 to 2025
- Oxford, Owen “Jack” — 1953 to 2012