| Surname | Given | Age | Date | Page | Maiden | Note |
|---|---|---|---|---|---|---|
| Oakley | Paul | 57 | April 20 | B-3 | ||
| O'Connor | Ola Marie | 80` | October 26 | B-3 | ||
| O'Dell | Morgan O. | 40 | July 6 | B-3 | ||
| O'Halla | Eleanore | 54 | December 9 | 19 | ||
| O'Keefe | Patricia B. | 82 | November 13 | B-3 | ||
| Okoneski | Helen M. | 64 | January 23 | A-11 | ||
| Olak | Frank | 75 | July 15 | 15 | ||
| Oller | Leroy | 12 | July 28 | 1 | ||
| O'Loughlin | James | 2 | August 25 | 1 | See also p. 11-middle name: Patrick, age - 22 months | |
| Olsen | Olava Karine | 80 | March 25 | 13 | ||
| Olszewski | Anastasia (Nettie) | 71 | May 18 | B-3 | ||
| Olszewski | Anthony | 49 | August 10 | B-3 | ||
| Olszowy | Casimir | 65 | November 23 | B-3 | ||
| O'Neal | Mrs. Ben | 60 | August 1 | C-3 | ||
| O'Neil | Timothy A. | 71 | June 2 | 1 | Also see Jun 3, p 11 | |
| O'Neill | Eugene J. | 57 | September 8 | 11 | ||
| Oppman | Mor N. | 70 | December 23 | 11 | ||
| Orban | Bailus | 42 | June 1 | B-3 | ||
| Orban | John Peter | 48 | April 18 | B-3 | ||
| Orban | Katherine | 85 | July 1 | B-3 | ||
| Orlich | Dan, Jr. | infant | June 19 | A-9 | ||
| Orlowski | Martin (Marcin) | 92 | May 4 | B-3 | ||
| Orminski | Mary | 56 | September 2 | 13 | ||
| Orth | Harriet E. | 76 | January 15 | B-3 | ||
| Ortiz | Agustin N. | 68 | September 26 | B-3 | ||
| Osburn | Lulu | 87 | February 6 | B-3 | ||
| Osler | Jay T. | 73 | July 6 | B-3 | picture included | |
| Overhage | Joseph C. | 69 | June 23 | 11 | ||
| Overmeyer | John W. | 73 | July 24 | B-3 | ||
| Ozemek | John | 76 | October 16 | B-3 |