| Surname | Given | Age | Date | Page | Maiden | Note |
|---|---|---|---|---|---|---|
| Oakley | Robert H. | 36 | February 7 | A-9 | ||
| Oblon | Joseph | 66 | February 7 | A-9 | ||
| Obradovich | Dovrosay | 62 | September 6 | 1 | ||
| Ochiltree | James Mason | 70 | November 15 | B-3 | ||
| Ochiltree | James Riley | 44 | July 12 | B-3 | ||
| Ochwat | Joseph | 80 | Februray 10 | B-3 | ||
| Odell | Cora | 87 | November 19 | B-3 | ||
| O'Donnell | James M. (Pat) | 64 | November 22 | C-3 | See also November 24, picture included | |
| Ogle | Leona | 67 | February 18 | A-9 | ||
| Ogrodowski | Bert | 84 | March 19 | B-3 | ||
| O'Keefe | Johanna | 85 | March 6 | B-3 | ||
| O'Laughlin | Michael J. | December 12 | B-3 | |||
| Oldenberg | Mary E. | 41 | July 29 | A-15 | ||
| Oldfield | Harold L. | 56 | September 12 | A-15 | ||
| Oliver | Annie H. | 90 | August 26 | B-3 | ||
| Oliver | John P. | 60 | October 17 | A-15 | ||
| Ollendorf | Willis M. | 70 | September 26 | B-3 | ||
| Olsen | Jeffrey Allen | 11 months | December 10 | B-3 | ||
| Olson | Andrew | 89 | December 5 | A-17 | ||
| Olson | Hannah E. | 81 | July 21 | B-3 | ||
| Olson | Hannah E. | 81 | July 22 | B-3 | ||
| Olson | Ludwig | 90 | May 6 | B-3 | ||
| Olszewski | Konstanty A. | 66 | February 28 | A-11 | ||
| Oltz | Allan C. | 70 | December 19 | B-3 | ||
| Oman | Ella | 71 | April 29 | B-3 | ||
| Oman | Gustaf | 73 | November 14 | B-3 | ||
| Oprea | Nick | 38 | July 14 | B-3 | ||
| Orban | Anna | 85 | October 3 | B-3 | ||
| Orban | Mary | 62 | October 13 | C-3 | ||
| Orich | Delores Veronica Theresa | 43 | January 3 | A-11 | ||
| Orich | Helen | 58 | July 12 | B-3 | ||
| Orlich | Angela | 64 | October 21 | B-3 | ||
| Ortman | Pearl | 69 | June 27 | B-3 | ||
| Osborne | Elaine | 48 | December 15 | B-3 | ||
| Osborne | George T. | 64 | July 14 | B-3 | ||
| Osenga | John | 65 | October 14 | A-15 | ||
| Oster | Peter J. | 48 | April 22 | A-15 | ||
| Ottinger | Ella G. | 78 | September 10 | B-3 | ||
| Oursler | Charles E. | 57 | December 22 | B-3 | ||
| Overhage | Donna Maria | 3 months | March 17 | B-3 | ||
| Overstreet | Paul | 44 | August 4 | 1 | Picture included |