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Earliest Records in IL County Courthouses |
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Family History Center: Locations ** Catalog Genealogical Societies in IL Compiled by the Staff of the Illinois Regional Archives |
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| County | Marriage | Birth | Death | Probate | Deeds | Court | County Board |
Organized | County Seat |
| Adams Fact Sheet |
1825 | 1877 | 1877 | 1826 | 1817 | 1825 | 1825 | 1825* | Quincy |
| Alexander Fact Sheet |
1819 | 1877 | 1878 | 1819 | 1818 | 1821 | 1819 | 1819 | Cairo |
| Bond Fact Sheet |
1817 | 1877 | 1877 | 1821 | 1817 | 1817 | 1817 | 1817 | Greenville |
| Boone Fact Sheet |
1838 | 1877 | 1877 | 1840 | 1838 | 1838 | 1836 | 1837 | Belvidere |
| Brown Fact Sheet |
1839 | 1878 | 1878 | 1839 | 1817 | 1837 | 1839 | 1839* | Mt Sterling |
| Bureau Fact Sheet |
1837 | 1878 | 1878 | 1837 | 1817 | 1837 | 1837 | 1837 | Princeton |
| Calhoun Fact Sheet |
1825 | 1878 | 1878 | 1833 | 1825 | 1825 | 1825 | 1825 | Hardin |
| Carroll Fact Sheet |
1839 | 1877 | 1877 | 1839 | 1837 | 1837 | 1839 | 1839 | Mt Carroll |
| Cass Fact Sheet |
1837 | 1878 | 1874 | 1837 | 1826 | 1837 | 1837 | 1837 | Virginia |
| Champaign Fact Sheet |
1833 | 1878 | 1878 | 1833 | 1833 | 1836 | 1833 | 1833 | Urbana |
| Christian Fact Sheet |
1839 | 1877 | 1877 | 1839 | 1828 | 1839 | 1839 | 1839 | Taylorville |
| Clark Fact Sheet |
1819 | 1865 | 1865 | 1820 | 1816 | 1821 | 1833 | 1819* | Marshall |
| Clay Fact Sheet |
1825 | 1877 | 1877 | 1827 | 1825 | 1825 | 1825 | 1824 | Louisville |
| Clinton Fact Sheet |
1825 | 1877 | 1877 | 1825 | 1818 | 1825 | 1825 | 1824 | Carlyle |
| Coles Fact Sheet |
1831 | 1878 | 1877 | 1830 | 1830 | 1831 | 1832 | 1830 | Charleston |
| Cook Fact Sheet |
1856 | 1871 | 1871 | 1850 | 1871 | 1871 | 1871 | 1831* | Chicago |
| Crawford Fact Sheet |
1817 | 1877 | 1877 | 1818 | 1816 | 1817 | 1817 | 1816 | Robinson |
| Cumberland Fact Sheet |
1880 | 1885 | 1844 | 1884 | 1885 | 1885 | 1885 | 1841* | Greenup |
| DeKalb Fact Sheet |
1837 | 1877 | 1878 | 1837 | 1838 | 1838 | 1837 | 1837 | Sycamore |
| DeWitt Fact Sheet |
1839 | 1877 | 1878 | 1839 | 1828 | 1839 | 1839 | 1839 | Clinton |
| Douglas Fact Sheet |
1859 | 1877 | 1877 | 1859 | 1830 | 1859 | 1859 | 1859 | Tuscola |
| DuPage Fact Sheet |
1839 | 1877 | 1877 | 1839 | 1835 | 1839 | 1839 | 1839 | Wheaton |
| Edgar Fact Sheet |
1823 | 1877 | 1877 | 1823 | 1823 | 1823 | 1823 | 1823 | Paris |
| Edwards Fact Sheet |
1815 | 1877 | 1877 | 1815 | 1815 | 1815 | 1815 | 1814 | Albion |
| Effingham Fact Sheet |
1833 | 1877 | 1877 | 1838 | 1833 | 1833 | 1833 | 1832 | Effingham |
| Fayette Fact Sheet |
1821 | 1860 | 1877 | 1821 | 1816 | 1821 | 1821 | 1821 | Vandalia |
| Ford Fact Sheet |
1859 | 1878 | 1878 | 1859 | 1834 | 1859 | 1859 | 1859 | Paxton |
| Franklin Fact Sheet |
1835 | 1877 | 1877 | 1837 | 1835 | 1836 | 1846 | 1818* | Benton |
| Fulton Fact Sheet |
1824 | 1878 | 1878 | 1827 | 1817 | 1824 | 1829 | 1823 | Lewistown |
| Gallatin Fact Sheet |
1813 | 1878 | 1878 | 1814 | 1813 | 1813 | 1807 | 1812* | Shawneetown |
| Greene Fact Sheet |
1821 | 1877 | 1877 | 1821 | 1821 | 1821 | 1821 | 1821 | Carrollton |
| Grundy Fact Sheet |
1841 | 1876 | 1878 | 1841 | 1832 | 1837 | 1841 | 1841 | Morris |
| Hamilton Fact Sheet |
1821 | 1878 | 1878 | 1821 | 1823 | 1821 | 1821 | 1821 | McLeansboro |
| Hancock Fact Sheet |
1829 | 1877 | 1878 | 1830 | 1817 | 1829 | 1829 | 1829 | Carthage |
| Hardin Fact Sheet |
1884 | 1884 | 1884 | 1884 | 1814 | 1878 | 1884 | 1839* | Elizabethtown |
| Henderson Fact Sheet |
1841 | 1877 | 1878 | 1839 | 1818 | 1841 | 1841 | 1841 | Oquawka |
| Henry Fact Sheet |
1837 | 1877 | 1877 | 1839 | 1836 | 1837 | 1837 | 1837 | Cambridge |
| Iroquois Fact Sheet |
1866 | 1878 | 1878 | 1834 | 1834 | 1834 | 1867 | 1833* | Watseka |
| Jackson Fact Sheet |
1843 | 1877 | 1877 | 1840 | 1814 | 1843 | 1823 | 1816* | Murphysboro |
| Jasper Fact Sheet |
1835 | 1877 | 1877 | 1835 | 1835 | 1835 | 1835 | 1834 | Newton |
| Jefferson Fact Sheet |
1819 | 1877 | 1877 | 1820 | 1816 | 1819 | 1819 | 1819 | Mt Vernon |
| Jersey Fact Sheet |
1839 | 1878 | 1877 | 1839 | 1822 | 1839 | 1839 | 1839 | Jerseyville |
| JoDaviess Fact Sheet |
1830 | 1877 | 1877 | 1828 | 1828 | 1827 | 1827 | 1827 | Galena |
| Johnson Fact Sheet |
1835 | 1878 | 1878 | 1821 | 1809 | 1812 | 1813 | 1812 | Vienna |
| Kane Fact Sheet |
1836 | 1877 | 1877 | 1836 | 1836 | 1836 | 1836 | 1836* | Geneva |
| Kankakee Fact Sheet |
1853 | 1877 | 1877 | 1853 | 1832 | 1853 | 1853 | 1853 | Kankakee |
| Kendall Fact Sheet |
1835 | 1877 | 1877 | 1847 | 1839 | 1841 | 1842 | 1841 | Yorkville |
| Knox Fact Sheet |
1837 | 1877 | 1877 | 1830 | 1818 | 1836 | 1830 | 1830 | Galesburg |
| Lake Fact Sheet |
1839 | 1877 | 1877 | 1839 | 1839 | 1840 | 1839 | 1839 | Waukegan |
| LaSalle Fact Sheet |
1831 | 1868 | 1870 | 1831 | 1831 | 1831 | 1831 | 1831 | Ottawa |
| Lawrence Fact Sheet |
1821 | 1878 | 1878 | 1821 | 1818 | 1820 | 1821 | 1821 | Lawrenceville |
| Lee Fact Sheet |
1839 | 1877 | 1877 | 1839 | 1838 | 1840 | 1839 | 1839 | Dixon |
| Livingston Fact Sheet |
1837 | 1877 | 1878 | 1837 | 1835 | 1839 | 1837 | 1837 | Pontiac |
| Logan Fact Sheet |
1857 | 1878 | 1878 | 1855 | 1829 | 1857 | 1867 | 1839* | Lincoln |
| Macon Fact Sheet |
1829 | 1877 | 1877 | 1831 | 1827 | 1829 | 1829 | 1829 | Decatur |
| Macoupin Fact Sheet |
1829 | 1877 | 1877 | 1829 | 1829 | 1829 | 1829 | 1829 | Carlinville |
| Madison Fact Sheet |
1813 | 1858 | 1877 | 1813 | 1802 | 1803 | 1813 | 1812 | Edwardsville |
| Marion Fact Sheet |
1823 | 1877 | 1877 | 1823 | 1819 | 1823 | 1823 | 1823 | Salem |
| Marshall Fact Sheet |
1839 | 1870 | 1877 | 1839 | 1839 | 1840 | 1839 | 1839 | Lacon |
| Mason Fact Sheet |
1841 | 1878 | 1877 | 1841 | 1827 | 1841 | 1841 | 1841 | Havana |
| Massac Fact Sheet |
1843 | 1877 | 1877 | 1843 | 1843 | 1843 | 1843 | 1843 | Metropolis |
| McDonough Fact Sheet |
1830 | 1870 | 1870 | 1833 | 1817 | 1830 | 1831 | 1830 | Macomb |
| McHenry Fact Sheet |
1837 | 1877 | 1877 | 1840 | 1838 | 1838 | 1837 | 1836 | Woodstock |
| McLean Fact Sheet |
1831 | 1877 | 1877 | 1831 | 1831 | 1831 | 1831 | 1830* | Bloomington |
| Menard Fact Sheet |
1839 | 1877 | 1877 | 1839 | 1821 | 1839 | 1833 | 1839 | Petersburg |
| Mercer Fact Sheet |
1835 | 1877 | 1877 | 1837 | 1834 | 1836 | 1835 | 1835 | Aledo |
| Monroe Fact Sheet |
1816 | 1877 | 1878 | 1820 | 1816 | 1816 | 1816 | 1816 | Waterloo |
| Montgomery Fact Sheet |
1821 | 1862 | 1877 | 1821 | 1819 | 1821 | 1821 | 1821 | Hillsboro |
| Morgan Fact Sheet |
1827 | 1851 | 1851 | 1824 | 1824 | 1828 | 1827 | 1823* | Jacksonville |
| Moultrie Fact Sheet |
1843 | 1877 | 1877 | 1845 | 1831 | 1849 | 1843 | 1843* | Sullivan |
| Ogle Fact Sheet |
1837 | 1878 | 1878 | 1836 | 1836 | 1837 | 1837 | 1837 | Oregon |
| Peoria Fact Sheet |
1825 | 1878 | 1877 | 1825 | 1818 | 1825 | 1825 | 1825 | Peoria |
| Perry Fact Sheet |
1827 | 1845 | 1878 | 1828 | 1817 | 1827 | 1827 | 1827 | Pinckneyville |
| Piatt Fact Sheet |
1841 | 1877 | 1877 | 1843 | 1840 | 1841 | 1843 | 1841 | Monticello |
| Pike Fact Sheet |
1827 | 1876 | 1877 | 1821 | 1818 | 1819 | 1821 | 1821* | Pittsfield |
| Pope Fact Sheet |
1813 | 1877 | 1877 | 1816 | 1816 | 1817 | 1816 | 1816 | Golconda |
| Pulaski Fact Sheet |
1861 | 1882 | 1882 | 1862 | 1843 | 1857 | 1873 | 1843* | Mound City |
| Putnam Fact Sheet |
1831 | 1877 | 1877 | 1831 | 1831 | 1831 | 1831 | 1831 | Hennepin |
| Randolph Fact Sheet |
1724 | 1877 | 1877 | 1722 | 1724 | 1722 | 1795 | 1795 | Chester |
| Richland Fact Sheet |
1841 | 1877 | 1877 | 1841 | 1836 | 1842 | 1841 | 1841 | Olney |
| Rock Island Fact Sheet |
1833 | 1861 | 1877 | 1835 | 1835 | 1834 | 1833 | 1833 | Rock Island |
| Saline Fact Sheet |
1845 | 1877 | 1878 | 1847 | 1817 | 1848 | 1847 | 1847 | Harrisburg |
| Sangamon Fact Sheet |
1821 | 1877 | 1877 | 1821 | 1822 | 1821 | 1821 | 1821 | Springfield |
| Schuyler Fact Sheet |
1825 | 1877 | 1877 | 1825 | 1817 | 1825 | 1825 | 1825 | Rushville |
| Scott Fact Sheet |
1839 | 1877 | 1877 | 1839 | 1823 | 1839 | 1839 | 1839 | Winchester |
| Shelby Fact Sheet |
1827 | 1877 | 1877 | 1831 | 1827 | 1827 | 1860 | 1827* | Shelbyville |
| Stark Fact Sheet |
1839 | 1877 | 1877 | 1839 | 1817 | 1839 | 1839 | 1839 | Toulon |
| St. Clair Fact Sheet |
1763 | 1830 | 1843 | 1772 | 1786 | 1778 | 1790 | 1790 | Belleville |
| Stephenson Fact Sheet |
1837 | 1878 | 1878 | 1837 | 1837 | 1837 | 1837 | 1837 | Freeport |
| Tazewell Fact Sheet |
1827 | 1878 | 1878 | 1827 | 1824 | 1827 | 1827 | 1827 | Pekin |
| Union Fact Sheet |
1818 | 1867 | 1877 | 1818 | 1818 | 1818 | 1818 | 1818 | Jonesboro |
| Vermilion Fact Sheet |
1826 | 1877 | 1877 | 1826 | 1826 | 1826 | 1826 | 1826 | Danville |
| Wabash Fact Sheet |
1857 | 1877 | 1877 | 1851 | 1857 | 1857 | 1825 | 1824* | Mt Carmel |
| Warren Fact Sheet |
1831 | 1877 | 1875 | 1830 | 1800 | 1832 | 1830 | 1830 | Monmouth |
| Washington Fact Sheet |
1831 | 1877 | 1877 | 1818 | 1815 | 1818 | 1818 | 1818 | Nashville |
| Wayne Fact Sheet |
1859 | 1870 | 1886 | 1886 | 1865 | 1819 | 1886 | 1819* | Fairfield |
| White Fact Sheet |
1816 | 1877 | 1877 | 1816 | 1816 | 1816 | 1816 | 1815 | Carmi |
| Whiteside Fact Sheet |
1857 | 1877 | 1877 | 1839 | 1838 | 1838 | 1839 | 1839 | Morrison |
| Will Fact Sheet |
1836 | 1877 | 1877 | 1837 | 1835 | 1836 | 1836 | 1836 | Joliet |
| Williamson Fact Sheet |
1839 | 1877 | 1877 | 1839 | 1818 | 1840 | 1839 | 1839 | Marion |
| Winnebago Fact Sheet |
1838 | 1877 | 1877 | 1837 | 1836 | 1836 | 1836 | 1836 | Rockford |
| Woodford Fact Sheet |
1841 | 1877 | 1877 | 1841 | 1831 | 1841 | 1841 | 1841 | Eureka |
*Counties with records losses by fire, flood, or other disasters. |
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