| Name | Born | Died | Age | Additional Info./Comments | Sec. |
| OAKES, Catharine A. | 1833 | 1875 | (On Perez Jones Stone) | K | |
| OAKES, Grace Turley | 1878 | 1955 | B2 | ||
| OAKES, Mary Turley | 1855 | 1901 | B2 | ||
| OAKES, Royal | 1854 | 1911 | B2 | ||
| OAKES, Valley | Dau of Royal & Mary Oakes | B2 | |||
| OAKLEY, Addie | (14 Jun 1933) | (65y) | B-2np | ||
| OBEN, Charles | (1 Nov 1926) | (83y) | Born Wisc.; Fm Valley City, Pike Co. | B-2np | |
| OBENDORF, John | (18 Oct 1881) | (1 Nov 1944) | (63y14d) | Fm Springfield, Sangamon Co. | B-2np |
| OBERMEYER, Catherine Ann | 18 Jan 1918 | B2 | |||
| OBERMEYER, Charles A. | (8 Feb) 1879 | (13 Jul) 1919 | B2 | ||
| OBERMEYER, Deane | 1893 | 1975 | C | ||
| OBERMEYER, Gertrude | (9 Oct) 1898 | (23 Jan) 1920 | Wife of Harry P. Obermeyer | C | |
| OBERMEYER, Harry P. | 1888 | 1969 | C | ||
| OBERMEYER, John | 1859 | 1919 | C | ||
| OBERMEYER, Maurice Dean | 7 Jan 1904 | 13 Sep 1983 | B2 | ||
| OBERMEYER, Maxe Allyn Sr. | 29 Jul 1916 | 27 Feb 1996 | B2 | ||
| OBERMEYER, Myrtle Six | 1877 | 1966 | B2 | ||
| OBERMEYER, Sadie B. | 1865 | 1939 | C | ||
| OBERMEYER, Vivian Dale Wyatt | 15 May 1906 | 18 Mar 1986 | B2 | ||
| OBERSE, George | (2 May 1927) | (35y) | B-2np | ||
| OBERT, Ollie | (31 Oct 1955) | (85y) | No Stone Found | D | |
| OBERT, William | 1897 | 1924 | D2 | ||
| OBERTATE, Charles H. | 1871 | 1946 | C | ||
| OBERTATE, Ernestine F. | 1911 | 1992 | C | ||
| OBERTATE, George Perbix | 1905 | 1974 | C | ||
| OBERTATE, Ida Perbix | 1875 | 1962 | Mother | C | |
| OBINYARD, Infant Male | (17 Jul 1875) | No Stone Found | D | ||
| OBRENTZ, Draga | 1875 | 8 Oct 1954 | SH | ||
| O'BRIAN, Richard | (29 Nov 1933) | (22y) | B-2np | ||
| O'BRIEN, Anna | (29 May 1876) | No Stone | D-PF | ||
| O'BRIEN, Christopher O. | (28 Aug 1930) | (50y) | No Stone Found | D | |
| O'BRIEN, James | (24 Jan 1906) | (65y) | A-1op | ||
| O'BRIEN, John | 1883 | 12 Jan 1948 | SH | ||
| O'BRIEN, Lois (Maguire) | 21 Sep 1921 | 11 Aug 2006 | (Wife of (1) Elsmore B. Mather; (2) Wm. O'Brien) | ||
| O'BRIEN, Michael | (26 Jul 1913) | (78y) | No Stone Found - Born Ireland | DC | |
| O'BRIEN, Sarah S. | 1863 | 1941 | C | ||
| O'CONNEL, William | 16 U.S. Inf. | V | |||
| O'CONNELL, Eva | (14 Jan 1918) | (65y) | No Stone Found | K | |
| O'CONNELL, Joseph B. | (20 Jun 1920) | (63y) | No Stone Found | K | |
| O'CONNELL, Margaret | (26 Oct 1887) | (62y) | No Stone Found | K | |
| OCONNER, Bertha | (14 Oct 1972) | No Stone Found | B | ||
| O'CONNER, Daniel (ashes) | (21 Jul 1956) | (65y) | No Stone Found | B | |
| ODELL, Eliza Ann | (12 Mar 1928) | (62y) | B-2np | ||
| O'DELL, Ethel Helen | 1885 | 1920 | B2 | ||
| ODERKIRK, Percy | (17 Jul 1880) | (33y) | No Stone - Born N.Y. | D-PF | |
| O'DONNEL, Katie | 18 Jun 1918 | SH | |||
| O'DONNELL, Catherine | (25 Jan 1893) | A-1op | |||
| O'DONNELL, Hugh | (11 Mar 1872) | No Stone - fm Livingston Co., Ill. | D-PF | ||
| OEHLER, Virginia Currier | 1882 | 1960 | D2 | ||
| O'FERRAL, John P. | 1900 | 30 Mar 1954 | SH | ||
| O'FIELD, Miss | (10 Oct 1873) | No Stone Found | F | ||
| OGDEN, Effie | (10 Oct 1965) | (78y) | No Stone Found | D | |
| OGDEN, Emma | 1886 | 1943 | D2 | ||
| OGDEN, Joseph | Dec 1830 | Mar 1899 | D2 | ||
| OGDEN, Joseph | 2 May 1832 | 3 Feb 1889 | D2 | ||
| OGDEN, Levi H. | (1877) | (14 Dec 1917) | No Stone Found | DC | |
| OGDEN, Robert | (23 Jun 1949) | (84y) | No Stone Found | D | |
| OGDEN, Sarah Edna | 1827 | 1903 | Grandma | D2 | |
| OGDEN, Thomas | (66y) | No Stone Found | D | ||
| OGLE, Earl | 1884 | 1934 | Son of J.B. & Margaret Ogle | D2 | |
| OGLE, Harry | 30 May 1931 | Ill. Corp. 8 Motor Sup. Tn. 8 Div. | B2 | ||
| OGLE, John B. | 1846 | 1929 | B2 | ||
| OGLE, Margaret A. | 1851 | 1927 | His Wife (Wife of John B. Ogle) | B2 | |
| OGRAM, Alfred James, Dr. | 16 May 1858 | 11 Dec 1926 | Mau | ||
| OGRAM, Flora Helen | 4 May 1860 | 27 Oct 1940 | Mau | ||
| O'HALLORAN, Anna | 1880 | 15 Jan 1951 | SH | ||
| O'HALLORAN, Mary | (1836) | (22 Jun 1921) | No Stone Found | DC | |
| OHARN, Dorothy | (9 Sep 1965) | (84y) | No Stone Found | P | |
| OHL, Anna | (7 Jul 1882) | (32y) | No Stone - Born Germany | D-PF | |
| OHLER, Virginia | (29 Oct 1960) | (85y) | No Stone Found | D | |
| OHNMACHT, Anton | (14 Mar 1894) | (50y) | Born Germany | A-1op | |
| OLDENBURG, Amelia S. Nebold | 1862 | 1963 | B2 | ||
| OLDERWURTEL, Louis | (24 Jan 1892) | (42y) | Born Germany, (Married) | A-1op | |
| OLDHAM, Shack | (31 Mar 1943) | (73y) | B-2np | ||
| OLDS, Ernest Albert | 1867 | 1947 | B1 | ||
| OLDS, Mary Doying | 1871 | 1947 | B1 | ||
| OLENSLAYGER, Louie | 1870 | 1952 | B2 | ||
| OLESKY, Victor | (5 Dec 1911) | (26y) | A-1op | ||
| OLIVER, Ada H. | 1868 | 1939 | Mother | D2 | |
| OLIVER, Carrie L. | 1860 | 1943 | L2 | ||
| OLIVER, Martha C. | 1845 | 1917 | A3 | ||
| OLIVER, Nelson | (10 Jul 1899) | (45y) | No Stone Found - Born Tenn. | D | |
| OLIVER, William A. | 1841 | 1904 | A3 | ||
| OLLENZYESKI, K. A. | 1883 | 13 Sep 1945 | SH | ||
| OLMSTED, Ellen B. | 1828 | 1890 | M | ||
| OLMSTEAD, Florence L. | Dec 1875 | (M) | |||
| OLMSTED, Lewis S. | 1827 | (10 Nov) 1905 | (Born N.Y.) | M | |
| OLROYD, Baby | (26 Sep 1899) | No Stone Found | L | ||
| OLROYD, Byron W. | 4 Mar 1908 | 16 Dec 1928 | L1 | ||
| OLROYD, George Howard | (18 Oct 1893) | (9m) | No Stone Found | L | |
| OLROYD, Henry S. | (4 Apr 1925) | (79y) | Co. D 101 Ill. Inf. | A2 | |
| OLROYD, Loyce W. | 1916 | 1985 | S | ||
| OLROYD, Myrtle V. | 8 Jul 1879 | 28 Feb 1965 | L1 | ||
| OLROYD, Sidney H. | 25 Mar 1917 | 6 May 1928 | L1 | ||
| OLROYD, W. J. | 10 Mar 1873 | 18 Sep 1957 | L1 | ||
| OLSEN, Fred | 1879 | 25 Mar 1952 | SH | ||
| OLSEN, Frederick O. | 1912 | 1967 | L2 | ||
| OLSEN, Kenneth L. | 1914 | 1953 | L2 | ||
| OLSEN, Mabel U. | 1890 | 1973 | L2 | ||
| OLSEN, Mary Jo | 1927 | 1932 | L2 | ||
| OLSEN, Otto M. | 1888 | 1932 | Pioneer Operator of Jacksonville Bus Line 1921 | L2 | |
| OLSEN, Violet Howerton | 1910 | 1995 | L2 | ||
| OLSON, Carl | (17 Sep 1906) | (69y) | A-1op | ||
| OLSON, Edwin G. | 13 Jan 1918 | 2 Apr 2005 | (Married 14 Feb 1943) | S | |
| OLSON, Emma | (8 Mar 1937) | (82y) | B-2np | ||
| OLSON, Eric Jon | 23 Apr 1989 | 6 May 2001 | Son of Tim & Gail Olson | S | |
| OLSON, Louise | (2 Jun 1928) | (82y) | B-2np | ||
| OLSON, Mary Ellen (Davis) | 23 Nov 1920 | 25 Jan 2011 | (Wife of Robert E. Williams & Edwin G. Olson) | S | |
| OLSON, Virginia M. (Bill) | 13 Mar 1923 | 2 Feb 1989 | (Wife of Edwin G. Olson) | S | |
| ONKEN, Amy Burnham | 23 Sep 1885 | 3 Oct 1963 | C | ||
| ONKEN, Fanny Burnham | 19 Aug 1861 | 28 Jun 1917 | C | ||
| ONKEN, Gustav | (77y) | No Stone Found | G | ||
| ONKEN, Harry Kirby | 25 May 1887 | 14 Nov 1981 | C | ||
| ONKEN, Harry Kirby Jr. | 4 Nov 1919 | 4 Nov 1919 | C | ||
| ONKEN, Irene Butcher | 28 Nov 1885 | 29 Nov 1960 | C | ||
| ONKEN, John C. | 24 May 1855 | 3 Jun 1943 | C | ||
| ONKEN, John Francis | 18 Mar 1899 | 4 Apr 1899 | C | ||
| OPPERMAN, Ethel Cruse | 30 May 1895 | 23 Jun 1975 | J | ||
| OPPERMAN, Harry R. | 1893 | 1944 | B2 | ||
| OPPERMAN, Herman | 1868 | 1926 | B2 | ||
| OPPERMAN, Herman Fred | 13 Nov 1896 | 16 Aug 1968 | J | ||
| OPPERMAN, Laura A. | 1869 | 1962 | B2 | ||
| OPPERMAN, Mabel | 1896 | 1972 | B2 | ||
| OPPERMAN, Mary Strubbe | 28 Jun 1933 | J | |||
| OPPERMAN, Stuart L. | 1903 | 1916 | B2 | ||
| OPPERMAN, Walter V. | 7 Oct 1933 | 28 Mar 1985 | Cpl. U. S. Army Korea | J | |
| OREAR, Daniel | Infant Son of Wm. & Thesta Orear | I | |||
| OREAR, Nettie | 1854 | 1918 | B2 | ||
| OREAR, Sallie B. (Browning) | (3 Jul) 1858 | (2 Jul) 1917 | (Dau of M. & Angeline Rees Browning) | B2 | |
| OREAR, Sawyer | Infant Son of Wm. & Thesta Orear | I | |||
| OREAR, Thesta M. | 16 Aug 1805 | 22 Jul 1830 | Wife of Wm. Orear | I | |
| OREAR, Thomas S. | 1839 | 1920 | B2 | ||
| OREAR, William | 24 Dec 1795 | 28 Apr 1876 | Born Frederick Co., Va. | I | |
| OREAR, William | Infant Son of Wm. & Thesta Orear | I | |||
| ORNELLAS, Noah | 23 Jul 1884 | 6 Dec 1969 | Dad | L1 | |
| ORNELLAS, Phinia B. | 20 Jul 1891 | 14 Feb 1960 | Mother (Wife of Noah Ornellas) | L1 | |
| O'ROARK, William | (30 Jul 1901) | (49y) | A-1op | ||
| ORR, Christopher M. | 28 Jan 1970 | 3 Aug 2006 | (Married 6 Jun 1992) | ||
| ORR, Lucy, Mrs. | 11 May 1873 | 72y | A3 | ||
| ORTON, Minnie | (12 Feb 1949) | (82y) | No Stone Found | D | |
| OSBORN, Alice | 1874 | 31 Oct 1954 | SH | ||
| OSBORNE, A. C. | (13 Jun 1910) | (74y) | A-1op | ||
| OSBORNE, Baby Son | 27 Mar 1884 | 27 Mar 1884 | Inf of J.H. & S.L. Osborne | K | |
| OSBORNE, C. A. | 1849 | 1930 | C | ||
| OSBORNE, Carry M. | 1875 | 1930 | Mau | ||
| OSBORNE, Corrine J. - (Obit) | 14 Jan 1945 | 9 Dec 2001 | Wife of Gary L. Osborne; Marr. 26 Apr 1964 | Ob | |
| OSBORNE, Daisy Rayhill | 1875 | 1939 | L2 | ||
| OSBORNE, David W. | 1855 | 1932 | C | ||
| OSBORNE, Elizabeth J. - (Obit) | 1830 | 1914 | A4 | ||
| OSBORNE, Ellen | 1900 | 1904 | Mau | ||
| OSBORNE, Georgia L. | 1860 | 1934 | D.A.R. | A4 | |
| OSBORNE, J. H. | 17 Dec 1848 | 9 Jun 1919 | K | ||
| OSBORNE, James E. | 1870 | 1940 | Mau | ||
| OSBORNE, John T. | 1846 | 1927 | Mau | ||
| OSBORNE, L. M. | 1871 | 1941 | A4 | ||
| OSBORNE, Lewis M. | 1892 | 1938 | C | ||
| OSBORNE, Louise Hill | 24 Dec 1851 | 11 Nov 1933 | K | ||
| OSBORNE, Martha A. | 1854 | (5 Apr) 1919 | C | ||
| OSBORNE, Mary A. | 1846 | 1933 | Mau | ||
| OSBORNE, Mary Capps | 9 Oct 1904 | 12 Jun 1994 | A3 | ||
| OSBORNE, Nettie K. | 1859 | 1942 | C | ||
| OSBORNE, R. N. | 1866 | 1907 | A4 | ||
| OSBORNE, R. T. | 1827 | 1887 | A4 | ||
| OSBORNE, S. S. | 1869 | 1916 | A4 | ||
| OSBORNE, Samuel D. | 1857 | 1905 | A4 | ||
| OSBORNE, Samuel N. | 26 Oct 1894 | 26 Dec 1978 | A3 | ||
| OSBORNE, Virginia Marie | 14 Oct 1918 | Daughter (Dau of Lewis & Virginia Osborne) | C | ||
| OSBORNE, Virginia R. | 1895 | 1968 | C | ||
| OSBORNE, W. C. | 1869 | 1942 | A4 | ||
| O'SHEA, Robert T. - (Obit) | 9 May 1935 | 16 Jun 2002 | Ob | ||
| OSTENDORF, Theresa | 1863 | 10 Mar 1918 | SH | ||
| OSTERHOLT, Clara | 1883 | 1933 | L2 | ||
| OSTERHOLT, Fred | 1875 | 1940 | L2 | ||
| OSTERHOLT, Herman | 1902 | 1923 | L2 | ||
| OSTERHOLT, Louis | (30 Dec 1922) | (65y) | No Stone Found | D | |
| OSTERLOH, Alice M. | 1866 | 1932 | Wife of Fred H. Osterloh | Mau | |
| OSTERLOH, Hattie | 1884 | 1943 | Mau | ||
| O'TOOLE, Charles | (21 May 1896) | (23y) | No Stone Found | DC | |
| O'TOON, Charles | (23 May 186) | (23y) | A-1op | ||
| OVERSTREET, Ford | (22 Mar 1939) | (71y) | B-2np | ||
| OVERSTREET, Isabell | (6 May 1872) | (10 Jan 1944) | (71y 8m 4d) | Fm Springfield, Sangamon Co. | B-2np |
| OVERSTREET, Margaret E. | (24 Dec 1882) | (29y) | No Stone | D-PF | |
| OVERSTREET, Susan | (19 Aug 1925) | (78y) | Born Ill.; Fm Plymouth, IL | B-1op | |
| OWDERKA, Herman | (1867) | (25 Apr 1924) | (57y) | Born Austria; Fm Morgan Co., Ill. | B-1op |
| OWEN, Aminta E. | (21 Nov 1875) | No Stone Found | K | ||
| OWEN, Eliza S. | 1840 | 1917 | His Wife (Wife of John A. Owen) | K | |
| OWEN, Father (Wm. Bryant) | 1853 | 1928 | D2 | ||
| OWEN, James T. | (28 Jul 1855) | (25 Oct 1913) | (57y) | No Stone Found | C |
| OWEN, James T., Mrs. | (6 Jan 1914) | No Stone Found | C | ||
| OWEN, John A. | 1835 | 1916 | K | ||
| OWEN, Louisa A. | 1970 | K | |||
| OWEN, Mother (Sarah M.) | 1852 | 1913 | D2 | ||
| OWEN, Susie | 1889 | (12 Mar) 1897 | (Born Maryland) | D2 | |
| OWENS, Amy | (1 Nov 1927) | (44y) | B-2np | ||
| OWENS, Donald S. | 10 Jun 1927 | D1 | |||
| OWENS, Eleanor M. | 25 Sep 1905 | 25 Jan 1982 | J | ||
| OWENS, Mary | (27 Sep 1878) | No Stone Found | K | ||
| OWENS, Nancy | (29 Nov 1893) | (57y) | A-1op | ||
| OWENS, Pauline | (7 Mar 1897) | No Stone Found | D | ||
| OWENS, Samuel | (4 Jun 1896) | (55y) | A-1op | ||
| OWENS, Shirley D. | 4 Aug 1931 | 20 Jan 1999 | D1 | ||
| OWENS, Tabitha | (28 Feb 1891) | (76y) | No Stone Found | K | |
| OWINGS, Fernando | (10 Dec 1955) | (85y) | No Stone Found | C | |
| OWINGS, Lillian B. | 1864 | 1920 | Mother | C | |
| OWINGS, Mary M. | 1896 | 1926 | C | ||
| OWINGS, Willard W. | (3 Jan 1923) | (18y) | No Stone Found | C | |
| OXLEY, Andrew Morgan | 20 Aug 1989 | 20 Nov 1989 | L1 | ||