| Surname | Given Name | Sex | Color | Age | Month | Day | Year | Locality | Book | Page | |
| Oard | Frank | M | W | 58 | Aug | 8 | 1917 | Richland Township | H-22 | 253 | |
| Odonnell | Patrick | M | W | 75 | Oct | 21 | 1915 | Bloomington | H-19 | 94 | |
| Odonnell | Sarah E | F | W | 73 | Jul | 6 | 1909 | Bloomington | H-19 | 18 | |
| Ogdon | Louis | M | W | 53 | Nov | 15 | 1920 | Perry Township | CH-30 | 573 | |
| Ogle | Isabelle B | F | W | 37 | Feb | 13 | 1913 | Benton Township | H-30 | 137 | |
| Oldhan | Mary | F | W | 33 | Sep | 9 | 1895 | Smithville | H-13 | 6 | |
| Oliphant | Albert | M | W | 26 | Dec | 21 | 1897 | Monroe County | H-13 | 76 | |
| Oliphant | Capt Jos Thos | M | W | 78 | May | 6 | 1911 | Bloomington | H-19 | 41 | |
| Oliphant | Elisa Anne | F | W | 85 | Feb | 6 | 1917 | Perry Township | CH-30 | 574 | |
| Oliphant | Frank | M | W | 74 | May | 15 | 1903 | Bloomington | H-17 | 17 | |
| Oliphant | Frank M | M | W | 74 | May | 15 | 1903 | Bloomington | H-16 | 4 | |
| Oliphant | Glover L | M | W | 25 | Apr | 4 | 1911 | Indian Creek Township | H-19 | 37 | |
| Oliphant | Harry | M | W | 22 | Dec | 21 | 1897 | Bloomington | H-13 | 76 | |
| Oliphant | Mary A | F | W | 74 | Aug | 7 | 1912 | Bloomington | H-19 | 56 | |
| Oliver | Not Listed | F | W | May | 22 | 1890 | Bloomington | H-12 | 40 | ||
| Oliver | Joseph | M | W | 77 | May | 25 | 1895 | Harrodsburg | H-13 | 6 | |
| Oliver | Nancy | F | W | 80 | Mar | 6 | 1911 | Harrodsburg | H-19 | 36 | |
| Oliver | William | M | B | 27 | Dec | 13 | 1907 | Bloomington | H-19 | 2 | |
| Oliver | William | M | B | 27 | Dec | 13 | 1907 | Bloomington | H-16 | 5 | |
| Oneal | Charlotte Owen | F | W | 55 | Nov | 19 | 1908 | Clear Creek Township | H-19 | 10 | |
| Oneal | Chas | M | W | 1 | May | 4 | 1911 | Bloomington | H-19 | 40 | |
| Oneal | Clinton | M | W | 55 | Aug | 19 | 1900 | Clear Creek Township | H-14 | 12 | |
| Oneil | Otis | M | W | 28 | Oct | 7 | 1913 | Clear Creek Township | H-20 | 299 | |
| Onsler | John | M | W | 2 | Jun | 4 | 1896 | Bloomington | H-12 | 56 | |
| Orchard | Helen M | F | W | 62 | Jun | 3 | 1906 | Bloomington | H-16 | 19 | |
| Orchard | Martha C | F | W | 76 | Jul | 25 | 1885 | Bloomington | H-12 | 15 | |
| Orr | Arthur A | M | W | 52 | Apr | 30 | 1899 | Bloomington | H-13 | 88 | |
| Osbern | Stella P | F | W | 5 Months | Jan | 31 | 1913 | VanBuren Township | H-20 | 300 | |
| Osborn | Rose Mary | F | W | 2 | Sep | 1 | 1917 | Perry Township | CH-30 | 575 | |
| Osborn | Wm F | M | W | 71 | Jan | 15 | 1906 | Bloomington | H-16 | 16 | |
| Osborne | Dorothy L | F | W | 2 | Sep | 3 | 1920 | Washington Township | H-23 | 360 | |
| Ostham | Henrietta | F | W | 87 | May | 21 | 1918 | Perry Township | CH-30 | 576 | |
| Osthaus | Frances W | F | W | 55 | Mar | 8 | 1910 | Bloomington | H-19 | 26 | |
| Osthaus | Francis W | F | W | 55 | Mar | 8 | 1910 | Monroe County | H-19 | 22 | |
| Ouster | John | M | W | 2 | Jun | 4 | 1896 | Bloomington | H-13 | 62 | |
| Owen | Benj O | M | W | 65 | May | 10 | 1920 | Perry Township | CH-30 | 578 | |
| Owen | Daniel J | M | W | 73 | Aug | 17 | 1907 | Bloomington | H-16 | 4 | |
| Owen | Ferry | M | W | 84 | Oct | 21 | 1902 | Indian Creek Township | H-17 | 10 | |
| Owen | Geo McQueen | M | W | 43 | Nov | 5 | 1900 | Bloomington | H-14 | 17 | |
| Owen | Glen A | M | W | 1 | Jan | 11 | 1904 | Bloomington | H-16 | 7 | |
| Owen | Harriet A | F | W | 78 | Apr | 23 | 1907 | Richland Township | H-19 | 4 | |
| Owen | Thomas I | M | W | 86 | Jan | 21 | 1920 | Bloomington Township | CH-30 | 571 | |
| Owens | Not Listed | M | W | 6 Days | Feb | 6 | 1907 | Bloomington | H-19 | 2 | |
| Owens | Charles Alfred | M | W | 36 | Aug | 25 | 1908 | VanBuren Township | H-19 | 8 | |
| Owens | Dortha | F | W | 86 | Jun | 26 | 1884 | Bloomington | H-12 | 10 | |
| Owens | Ella J | F | W | 13 | Oct | 30 | 1918 | Bloomington Township | CH-30 | 577 | |
| Owens | Emma | F | W | 45 | Apr | 7 | 1906 | Bloomington | H-16 | 18 | |
| Owens | Glen A | M | W | 1 | Jan | 11 | 1904 | Bloomington | H-16 | 1 | |
| Owens | Louisa | F | W | 64 | Nov | 13 | 1902 | Bloomington | H-16 | 2 | |
| Owens | Louisa | F | W | 64 | Nov | 13 | 1902 | Bloomington | H-17 | 11 | |
| Owens | Martha J | F | W | 61 | Oct | 5 | 1905 | Bloomington | H-18 | 24 | |
| Owens | Neoma R | F | W | 10 Months | Jun | 25 | 1913 | Bloomington | H-19 | 65 | |
| Owens | Owen | M | W | 62 | Apr | 2 | 1906 | Bloomington | H-16 | 16 | |
| Owens | Raymond | M | W | 16 | Jun | 6 | 1915 | Bloomington | H-19 | 90 | |
| Owens | Samuel J | M | W | 73 | Aug | 17 | 1907 | Bloomington | H-16 | 24 | |
| Owens | Wm J | M | W | 40 | Apr | 14 | 1913 | Bloomington | H-19 | 63 | |
| Owens | Wm S | M | W | 75 | Nov | 15 | 1902 | H-17 | 11 | ||