| Name | Born | Died | Age | Additional Info./Comments | Sec. |
| IDE, Infant of Eugene | (12 Apr 1901) | (16 Apr 1901) | No Stone Found | DC | |
| IDE, Lillian M. | Mar 1904 | 22y | (On Jeremiah Sibert lot) | (M) | |
| IGLEHART, Christine | (13 Mar 1921) | (27y) | No Stone Found | D | |
| IGLEHART, John | (23 May 1926) | No Stone Found | D | ||
| IGLEHART, Marion A. | (6 May 1943) | (78y) | No Stone Found | D | |
| IGLEHART, Mary Alice | (31 May 1909) | (42y 8m) | No Stone Found | D | |
| ILES, Katherine Hayden | 1899 | 1955 | D2 | ||
| IMBODEN, John | (7 Oct 1926) | (53y) | No Stone Found | B | |
| IMBODEN, Louis | (23 Nov 1930) | (59y) | No Stone Found | D | |
| IMBODEN, Minnie | (30 Jan 1940) | (92y) | No Stone Found | B | |
| IMBODEN, Peter | (7 Apr 1914) | No Stone Found | B | ||
| IMBODEN, Walter | (11 Oct 1920) | (42y) | No Stone Found | B | |
| IMM, Tina | (26 Jul 1883) | (35y) | Born Tenn./Germany; | A-1op | |
| INBODSON, Arne | (1883) | (13 Nov 1928) | (45y) | Born Norway; Fm Springfield, Sangamon Co. | B-2np |
| INGALLS, Elizabeth W. | 23 Aug 1866 | 31 Oct 1942 | C | ||
| INGALLS, Samuel W. | 1 Jan 1845 | 25 Feb 1927 | C | ||
| INGOLDSBY, Clarence | 1884 | 1936 | D2 | ||
| INGOLDSBY, Eva E. Decker | 1894 | 1989 | D2 | ||
| INGRAHAM, Phil | 1864 | 1942 | I | ||
| INGRAM, Agnes (Johnson) | 25 Feb 1927 | 8 Jan 1977 | Wife of Ivan R. Ingram | C | |
| INGRAM, Andrew | 1851 | 1918 | C | ||
| INGRAM, Grace A. | 1888 | 1954 | E | ||
| INGRAM, Heather M. | 13 Oct 1990 | 13 Oct 1990 | P | ||
| INGRAM, Ivan A. | 14 May 1895 | 11 Mar 1964 | Father (Veteran) | C | |
| INGRAM, Ivan R. | 1 Aug 1925 | 12 Jun 2004 | Married 1 Sep 1951 | C | |
| INGRAM, Mary O. | 1854 | 1937 | His Wife (Wife of Andrew Ingram) | C | |
| INGRAM, Nellie E. | 1886 | 1969 | C | ||
| INGRAM, Oscar C. | 1885 | 1936 | E | ||
| INGRAM, Zella T. | 9 Sep 1896 | 8 Feb 1976 | Mother (Wife of Ivan Ingram) | C | |
| INMAN, Aaron | (1 Jul 1872) | No Stone - fm Union Co., Ill. | D-PF | ||
| INMAN, Catherine Irene | (21 Feb 1968) | (1d) | No Stone Found | L | |
| INMAN, Robert L. | 7 Jun 1933 | 2 Aug 1960 | D2 | ||
| INMAN, W. A. | 1851 | 1933 | I | ||
| INMEN, Hiram | (9 May 1923) | (78y) | No Stone Found | D | |
| INNES, A. | Illinois School for Deaf Memorial | K | |||
| INNES, E. * | Illinois School for Deaf Memorial | K | |||
| IRLAND, Martha A. | 18 Apr 1823 | 22 Jan 1898 | L2 | ||
| IRLAND, Thomas C. | 20 Feb 1816 | 21 Sep 1892 | L2 | ||
| IRONMONGER, Dora | 3 May 1844 | 11 Jul 1915 | His Wife (Wife of Joseph J. Ironmonger) | DD | |
| IRONMONGER, Jos. J.-(Obit) | 16 Mar 1842 | 30 Jan 1895 | DD | ||
| IRVIN, Frank T. | 1863 | 1943 | V | ||
| IRVIN, Nancy E. | 1869 | 1943 | V | ||
| IRVIN, Ruth C. | 1895 | 1924 | V | ||
| IRVING, Charles | (19 Feb 1882) | No Stone Found | I | ||
| IRVING, Henry - (Obit) | 10 Jul 1888 | 72y1m | |||
| IRVING, Henry W. | 5 May 1861 | 1y 5m | Child of H. & M. Irving | V | |
| IRVING, Katie R. | 12 Aug 1861 | 7y 7m | Child of H. & M. Irving | V | |
| IRVING, Mary | 28 Aug ???? | ?2y 4d | Wife of Henry Irving; Buried East Hart_____ | V | |
| IRVING, Samuel | 24 Jul 1849 | 1y 8m | Child of H. & M. Irving | V | |
| IRVING, William | (9 Jul 1888) | No Stone Found | I | ||
| IRVING, William M. | (10 Aug 1871) | No Stone Found | I | ||
| IRWIN, Sarah Ann | 17 Jan 1840 | 2 Jan 1921 | F | ||
| ISAACS, William | (30 Apr 1868) | (16 May 1944) | (74y 15d) | Fm Divernon, IL | B-2np |
| ISAM, Bart | (1881) | (12 Jun 1925) | (44y) | (Single); Fm Cook Co. | B-1op |
| ISBISTER, Child of Robert | No Stone Found | A | |||
| ISCH, Benedict | (19 May 1899) | (45y) | A-1op | ||
| ISEMINGER, J. A. | 1827 | 1910 | I | ||
| ISENHOWER, R. E. "Gene" | 21 Dec 1925 | I | |||
| ISENHOWER, Vivian M. | 4 Nov 1925 | I | |||
| ISLES, Katherine | (31 Jul 1955) | (53y) | No Stone Found | D | |
| ISRAEL, | (Big Stone face down in front of Israel spire) | K | |||
| ISRAEL, Hettie | 1802 | 1883/95 | Aunt | K | |
| ISRAEL, Isaac C. | 1799 | 1885 | K | ||
| ISRAEL, Jane P. | 1800 | 1843 | K | ||
| ITATUT, Ignatz | (23 Sep 1927) | (67y) | B-2np | ||
| IUMBOSKY, Mary | 1881 | 1 Jun 1950 | SH | ||
| IVERSON, Charlotte E. | (11 Jan 1881) | (36y) | No Stone - born Ill. | D-PF | |
| IVES, Susan M. | (12 Apr 1889) | (45y) | Fm Adams Co., born Ill. (Married) | A-1op | |