| NAME | FILE | DATE |
| Oastler, John R. | 1211 | 1916 thru 1925 |
| Oberg, Elvera | 3939 | 1966 thru 1975 |
| Oberg, George A. | 3702 | 1956 thru 1965 |
| Oberg, Lester G. | PR96-61 | 1996 - |
| Oberg, Nora A. | PR97-9 | 1996 - |
| Oborny, Blanche | 3544 | 1956 thru 1965 |
| Oborny, Frank | 170 | 1915 and prior |
| Oborny, Frank J. | 2737 | 1946 thru 1955 |
| Oborny, Rudolph, aka Edward Rudolph | 3206 | 1956 thru 1965 |
| Oborny, Stanley L. | 4754 | 1966 thru 1975 |
| O'Brien, Albert J. | P81-16 | 1976 thru 1985 |
| O'Brien, Amelia | PR87/33 | 1976 thru 1985 |
| O'Brien, Francis J. | 3926 | 1966 thru 1975 |
| O'Brien, Hanora | 1843 | 1926 thru 1935 |
| O'Brien, John | 941 | 1915 and prior |
| O'Brien, John H. | PR89-40 | 1976 thru 1985 |
| O'Brien, John J. | 1407 | 1916 thru 1925 |
| O'Brien, Winifred | 2219 | 1936 thru 1945 |
| Obrychta, Joseph | 1955 | 1936 thru 1945 |
| Obrychta, Joseph J. | 2692 | 1946 thru 1955 |
| O'Callaghan, Bride | 1503 | 1926 thru 1935 |
| O'Connell, John | 1046 | 1916 thru 1925 |
| Odum, Amber, aka Helen | 4804 | 1976 thru 1985 |
| Odum, John Richard, aka Dick | 3606 | 1956 thru 1965 |
| Odum, Windsor A. | 4722 | 1966 thru 1975 |
| Odvarka, Anton | 1608 | 1926 thru 1935 |
| Odvarka, Anton, Jr. | 3864 | 1966 thru 1975 |
| Odvarka, Dr. V.L., aka V.L. Odvarka | 5093 | 1976 thru 1985 |
| Odvarka, Frank J. | 3827 | 1966 thru 1975 |
| Odvarka, Helen | PR96-35 | 1996 - |
| Odvarka, Josephine | 857 | 1915 and prior |
| Odvarka, Josie, aka Josie A. | 3404 | 1956 thru 1965 |
| Odvarka, Lena | 3912 | 1966 thru 1975 |
| Odvarka, Lena | 3740 | 1956 thru 1965 |
| Odvarka, Otto | 2633 | 1946 thru 1955 |
| Odvarka, Pinna | 3357 | 1956 thru 1965 |
| Oehlrich, Arnold G.H. | 3710 | 1956 thru 1965 |
| O'Hare, Annie | PR86-80 | 1986 thru 1995 |
| O'Hare, Edith | 4844 | 1976 thru 1985 |
| O'Hare, John B. | PR87/46 | 1976 thru 1985 |
| O'Hare, Raymond | PR96-47 | 1996 - |
| O'Hare, Rita | PR94-60 | 1976 thru 1985 |
| Oldigs, Henry G. | 2991 | 1956 thru 1965 |
| Oldigs, Herman J. | PR93-49 | 1976 thru 1985 |
| Oldigs, Herman, Sr. | 1481 | 1926 thru 1935 |
| Oldigs, Johanna | 4894 | 1976 thru 1985 |
| Oldigs, John H. | 3068 | 1956 thru 1965 |
| Oldigs, John Herman | 1226 | 1916 thru 1925 |
| Oldigs, Margeratha | 1637 | 1926 thru 1935 |
| Oldigs, Sophia M. | 4942 | 1976 thru 1985 |
| Olsen, Alvin | 2712 | 1946 thru 1955 |
| Olsen, Carrie M. | 3761 | 1966 thru 1975 |
| Olsen, Charles | 312 | 1915 and prior |
| Olsen, Lily E. | 4981 | 1976 thru 1985 |
| Olsen, Mary | 954 | 1915 and prior |
| Olsen, Paul | 2661 | 1946 thru 1955 |
| Olson, Lily M., aka Lillie | PR88-43 | 1976 thru 1985 |
| Olson, Raymond H. | 3975 | 1966 thru 1975 |
| Oltman, John Herman | 172 | 1915 and prior |
| Oltmann, August | 3739 | 1956 thru 1965 |
| Oltmann, Frederick C. | 4361 | 1966 thru 1975 |
| Oltmann, Gesine | 1419 | 1926 thru 1935 |
| Oltmann, Louise | 4870 | 1976 thru 1985 |
| Oltmer, Anna E. | P84-18 | 1976 thru 1985 |
| Oltmer, Edward V., Sr. | P80-2 | 1976 thru 1985 |
| Oltmer, Merlin Henry | PR90-22 | 1976 thru 1985 |
| Oltmer, Walter J. | P80-7 | 1976 thru 1985 |
| Oman, Martha | 2334 | 1936 thru 1945 |
| Oman, Martha | 171 | 1915 and prior |
| Ondra, Frank | 1038 | 1916 thru 1925 |
| Ondra, Frantiska | 920 | 1915 and prior |
| Ondracek, Anton J. | 3587 | 1956 thru 1965 |
| Ondracek, Barbora | 2311 | 1936 thru 1945 |
| Ondracek, Charles J. | 4529 | 1966 thru 1975 |
| Ondracek, Frantiska | 2186 | 1936 thru 1945 |
| Ondracek, John C. | PR89-48 | 1976 thru 1985 |
| Ondracek, Joseph B. | P82-97 | 1976 thru 1985 |
| Ondracek, Libbie Ann | 3900 | 1966 thru 1975 |
| Ondracek, Stanley J. | 3960 | 1966 thru 1975 |
| Opatril, Joseph | 654 | 1915 and prior |
| Opatril, Marie | 1155 | 1916 thru 1925 |
| Otradosky, Joseph J. | PR88-66 | 1976 thru 1985 |
| Otradosky, Robert J. | PR97-13 | 1996 - |
| Otradosky, Rose | PR96-68 | 1996 - |
| Otradovsky, Anna | 2996 | 1956 thru 1965 |
| Otradovsky, Edward F., aka Edward F. Otradosky | 4051 | 1966 thru 1975 |
| Otradovsky, Irma C. | 4474 | 1966 thru 1975 |
| Otradovsky, Joseph H. | 3154 | 1956 thru 1965 |
| Otradovsky, Lumir F. | P84-86 | 1976 thru 1985 |
| Otto, Antonia | 1494 | 1926 thru 1935 |