| Name | Birth Date | Birth Place | Death Date | County | Mother's Maiden Name | Number | Box |
| Ible, William Henry | 02 Dec 1855 | Illinois | 06 Jun 1921 | Jasper | Thomas | 50-2978 | D2238 |
| Ilgenfritz, Mary Elizabeth | 08 Oct 1863 | Pennsylvania | 09 Jul 1934 | Jasper | Kibler | E50-0105 | D2732 |
| Iliff, George Harlan | 29 Mar 1869 | Iowa | 10 Jul 1928 | Jasper | George | 50-1950 | D2240 |
| Iliff, Susan | 17 Jun 1874 | Iowa | 12 Oct 1935 | Jasper | Woodard | C50-0103 | D2765 |
| Illingworth, Frank Edward | 11 Feb 1859 | Minnesota | 25 Aug 1936 | Jasper | | A50-0091 | D2796 |
| Ingraham, William D. | 01 May 1846 | New York | 17 Aug 1928 | Jasper | Doig | 50-1984 | D2240 |
| IntVeldt, Marie | 24 Aug 1853 | Holland | 19 Nov 1932 | Jasper | | C50-0135 | D2670 |
| Ippel, Gerrit (Mrs.) | 09 Aug 1839 | Netherlands | 08 Mar 1932 | Jasper | Kiepoon | C50-0085 | D2670 |
| Irish, Irving A. | 11 Feb 1866 | Iowa | 02 Nov 1936 | Jasper | | G50-0146 | D2796 |
| Irwin, Bessie Corena | 11 Dec 1919 | Iowa | 12 Jun 1920 | Jasper | Lamb | 50-2775 | D2238 |
| Irwin, Exann Bisher | 21 Jan 1859 | Iowa | 09 Aug 1932 | Jasper | Cochrane | C50-0099 | D2670 |
| Iske, Lena Mary | 03 Dec 1885 | Nebraska | 12 Sep 1919 | Jasper | Crowder | 50-2556 | D2238 |
| Iske, Vincent | 06 Jul 1904 | Iowa | 06 Jun 1928 | Jasper | Carson | 50-1947 | D2240 |
| Iske, William F. | 18 May 1865 | Iowa | 08 Sep 1930 | Jasper | Bodenhousen | A50-0190 | D2616 |
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