| Surname | Given Name | Birthdate | Deathdate |
| OAKLAND | Baby | 22 Aug 1913 | |
| OARD | Anna Sylvia | 26 Jan 1934 | |
| OBERG | Segred | 24 June 1912 | |
| O'CONNOR | Lorne | 29 Apr 1920 | |
| ODELL | Baby | 5 May 1923 | |
| OGDEN | Baby | 26 July 1913 | |
| OIE | Vera E | 23 Aug 1921 | |
| OKADA | K | 13 Apr 1918 | |
| OKEEFE | Annie | 16 Apr 1918 | |
| OLAFSON | Segridur Mrs | 21 July 1921 | |
| O'LEARY | Alice | 28 Nov 1871 | 25 Aug 1922 |
| O'LEARY | Frank | 25 May 1916 | |
| OLENICK | Nick | 15 Nov 1919 | |
| OLIVE | G W (Baby) | 8 Aug 1911 | |
| OLIVE | Baby Helen Isabelle | 14 Sept 1910 | |
| OLIVE | Baby | 19 Aug 1913 | |
| OLIVER | John Dawson | 13 Aug 1912 | |
| OLIVER | Bertie (Robin Edwin) | 23 Nov 1906 | 4 May 1912 |
| OLIZNYK | Catherine | 3 Feb 1911 | |
| OLLENBERGER | Anthony | 24 Apr 1923 | |
| OLSEN | Fred N | 12 Aug 1913 | |
| OLSEN | E | 3 May 1919 | |
| OLSEN | Hattie | 1 Dec 1919 | |
| OLSON | Conrad | 14 Jan 1925 | |
| OLSON | Annie | 1 Oct 1913 | |
| OLYNYK | Fedir | 1910 | |
| ONEIL | Baby | 9 July 1919 | |
| ONEIL | Baby | 10 June 1919 | |
| ONEIL | Baby | 7 Sept 1912 | |
| ORCHARD | Raymond R | 21 Aug 1916 | 22 Aug 1917 |
| ORCHARD | Baby | 1 Sept 1914 | |
| ORDGSKEY | Astina (Baby) | 26 Aug 1911 | |
| OREILLY | Janet | ||
| ORR | Sarah E | 6-May-1920 | |
| ORR | Wm Thorne | 8 Apr 1935 | |
| ORR | B | ||
| ORR | Matthew | 6 Aug 1918 | |
| ORSER | Lucinda Agnes | 1863 | 30 Dec 1918 |
| ORSER | Edward Evans | 1860 | 11 May 1926 |
| OSBORNE | Rose | ? | |
| OSBORNE | Henry | 31 Mar 1926 | |
| OSBORNE | Dolly V | 31 May 1923 | |
| OSBORNE | Infant | 12 Apr 1917 | |
| OSHYAMA | Toji | 21 Nov 1914 | |
| OSLER | Elizabeth Cooper | 1 Oct 1906 | |
| OSTEAD | John | 3 Nov 1908 | |
| OSTENO | Christopher | 17 Nov 1917 | |
| OSTRUM | Hattie | 1875 | 5 Jan 1959 |
| OSTRUM | Guy | 1882 | 11 May 1920 |
| OTTO | Eliza Jane | 1868 | 23 Mar 1961 |
| OTTO | Geo H | 18 Aug 1874 | 17 Dec 1918 |
| OTTUM | S | 3 Oct 1912 | |
| OUDERKIRK | Douglas Grant | 1906 | 12 Nov 1916 |
| OUDERKIRK | Grace Lillian | 1880 | 6 June 1972 |
| OUDERKIRK | Peter Edmund | 1877 | 9 Sept 1971 |
| OUTERMAN | ? | 26 Oct 1918 | |
| OVERBEY | Baby | 28 Sept 1914 | |
| OWENS | Baby | 31 July 1909 |