| Name | Birth date | Death date | Spouse |
|---|
| OAKES, Winnie | Private | | Rutland, ? |
| O'BRIEN, Cornelius | 4 September 1875 | Unknown | DeLauder, Loretta (Lottie) |
| O'BRIEN, Dennis | | Unknown | McAulf, Kate |
| O'BRIEN, Grover Fanning | Private | | Swinney, Virginia |
| O'BRIEN, Marcum Clay | Private | | |
| O'BRIEN, Vista Irene | Private | | |
| O'BRIEN, William | | Unknown | Wilmoth, Blanche Hope |
| O'CONNOR, Mary | 25 January 1841 | 11 May 1936 | Scott, Isaac |
| O'CONNOR, Patrick | | Unknown | Quirm, Bridget |
| O'DELL, Glenna | Private | | Kittle, Perry Ray |
| OGDEN, Harriet | | Unknown | Dever, Gilbert |
| OGDEN, John Morgan | Private | | Smart, Alice Mercedes |
| OGDEN, Max Edward | Private | | Dana, Dawn Renee |
| OGDEN, Max Edward, Jr. | Private | | |
| OLDAKE, Delores | Private | | |
| OLDAKE, Martha | Private | | |
| OLDAKE, Stanley | Private | | Murphy, Goldie |
| OLDAKE, Stanley Leon | Private | | |
| OLIPHANT, Charles Eugene | 12 August 1890 | 22 March 1967 | Channel, Almonta Grace |
| OLIPHANT, Lemuel O. | | Unknown | Walters, Agnes |
| OLIVE | | Unknown | Phillips, Thomas |
| OLIVER, Stella | | Unknown | Stalnaker, Isaac |
| OLIVER, Vicky Denise | Private | | Allen, Keith Royce, Jr. |
| OLSEN, Albert Daniel | 30 December 1897 | 17 April 1995 | Bennett, Mary Eleanor |
| OLSEN, Barbara | Private | | |
| OLSEN, James | Private | | |
| OLSEN, Lawrence | Private | | |
| OLSEN, Leonard | Private | | |
| OLSEN, Louis | Private | | |
| O'NEALL, John Hugh | 20 November 1888 | 20 August 1966 | Eiseman, Mabel Georgina |
| O'NEALL, William M. | 30 January 1833 | 13 April 1900 | Palmer, Florence Elizabeth |
| O'NEIL, Chester H. | | Unknown | Shaffer, Jenettie Mertie |
| O'NEIL, Florence | | Unknown | DeLauder, William (De Latur) |
| O'NEIL, Harry | | Unknown | Murphy, Eva May |
| ORNDORFF, Ernest A. | 10 July 1904 | 21 October 1975 | Hall, Grace V. |
| ORNDORFF, Ernest, Jr | Private | | |
| ORNDORFF, Gene Hall | 18 September 1934 | 24 November 1998 | |
| ORNDORFF, Lamont | Private | | |
| ORNDORFF, Lorraine | Private | | |
| OROSCO, Roxana | Private | | Eggerstedt, Reynaldo |
| ORSINI, Sylvia | Private | | Murphy, James Ralph |
| ORTEL, Walter | | Unknown | Bergmann, Elizabeth Emily Fannie |
| OSBORNE, Patricia Ruth | Private | | Compton, Olin Randall |
| OSTER, Georg | | Unknown | Brunner, Anna Barbara |
| OSTER, Johann | | Unknown | ?, Anna |
| OSTER, Johann Adam | 1753 | 1781 | Kiefenreuter, Anna Maria |
| OSTER/EASTER, Abigail | 5 December 1802 | 1875 | |
| OSTER/EASTER, Adam | Abt. 1800 | Unknown | |
| OSTER/EASTER, Anna Barbara | 18 February 1775 | Aft. 1795 | |
| OSTER/EASTER, Barbara | 17 December 1793 | 3 July 1833 | |
