| Surname | Given | Age | Date | Page | Maiden | Note |
|---|---|---|---|---|---|---|
| Obelein | Susan | 66 | October 1 | B-3 | ||
| Obremski | Anthony | 84 | December 10 | B-3 | ||
| O'Brien | Lillian | 80 | November 29 | B-3 | ||
| Odenthal | Henry | 40 | November 15 | B-3 | ||
| O'Donnell | Daisy | 63 | January 19 | B-3 | ||
| Ogden | Emily Ott | 87 | February 16 | A-13 | ||
| Ogle | James (Ted) | November 13 | 1 | |||
| O'Keefe | James | 17 | November 24 | 1 | ||
| Oldendorf | Emma | 71 | April 20 | B-3 | ||
| Olin | Mrs. Thomas | 53 | June 8 | B-3 | First name Estelle M. see D-7 | |
| Olkowski | Anastasia | 79 | August 30 | B-3 | ||
| Olsen | Antone | 59 | November 19 | B-3 | ||
| Olsen | Carrrie W. | 70 | May 10 | B-3 | ||
| Olson | Marie | 62 | June 27 | B-3 | ||
| Olson | Marie Alice | 58 | May 19 | C-3 | ||
| Olthoff | Effie | 86 | July 24 | B-3 | ||
| Oltz | Harry M. | October 22 | B-3 | |||
| Oltz | Margaret H. | 62 | April 2 | C-3 | ||
| O'Mara | Bartholomew | 70 | September 21 | B-3 | ||
| O'Neal | Emma | 79 | June 16 | B-3 | ||
| Orange | Joe Mike | 26 | May 14 | 1 | ||
| Orange | Joseph M. | 26 | May 15 | A-11 | ||
| Orbu | Everett W. | 64 | June 22 | B-3 | ||
| Osborne | Richard F. | 51 | December 10 | B-3 | ||
| Osborne | Samuel | 82 | August 21 | A-11 | ||
| Osmulski | Casimir | 46 | July 25 | A-15 | aka Smulski, Casimir | |
| Ostrom | Glenna Kay | 5 weeks | November 10 | C-3 | ||
| Ostrowski | Katherine | 62 | January 30 | B-3 | ||
| Otto | Carl A. | 45 | May 16 | B-3 | ||
| Outler | Daniel | 58 | June 25 | B-3 | ||
| Ovanovich | John | 72 | November 6 | B-3 | ||
| Owens | Mrs. John | 42 | July 5 | B-3 | First name Jeanne, see D-4 |