Illinois has 102 Counties
| County Name | Date of Formation |
Parent County | County Seat | County Coordinators |
|---|---|---|---|---|
| Adams | 1825 | Pike | Quincy | Dennis Partridge |
| Alexander | 1819 | Union | Cairo | Deborah Cox |
| Bond | 1818 | Madison | Greenville | Norma Hass |
| Boone | 1836 | Winnebago | Belvidere | ADOPTABLE |
| Brown | 1837 | Schuyler | Mount Sterling | Dennis Partridge |
| Bureau | 1837 | Putnam | Princeton | ADOPTABLE |
| Calhoun | 1825 | Pike | Hardin | ADOPTABLE |
| Carroll | 1839 | Jo Daviess | Mount Carroll | ADOPTABLE |
| Cass | 1837 | Morgan | Virginia | Rebecca Maloney |
| Champaign | 1833 | Vermilion | Urbana | ADOPTABLE |
| Christian | 1839 | Dane (Montgomery, Sangamon, Shelby) | Taylorville | Morgan Edward Johnson |
| Clark | 1819 | Crawford | Marshall | Joy Fisher |
| Clay | 1824 | Crawford, Fayette, Wayne | Louisville | Sandy Bauer |
| Clinton | 1824 | Bond, Washington | Carlyle | Larry Jones |
| Coles | 1830 | Clark, Edgar | Charleston | ADOPTABLE |
| Cook | 1831 | Putnam | Chicago | Lu Ann Pilar |
| Crawford | 1816 * | Edwards (IT) | Robinson | Mary Kozy |
| Cumberland | 1843 | Coles | Toledo | Michael L. Hebert |
| Dane | 1839 | Montgomery, Sangamon, Shelby | Extinct-1840 now Christian |
ADOPTABLE |
| DeKalb | 1837 | Kane | Sycamore | ADOPTABLE |
| DeWitt | 1839 | Macon, McLean | Clinton | Cheryl Rothwell |
| Douglas | 1859 | Coles | Tuscola | ADOPTABLE |
| DuPage | 1839 | Cook | Wheaton | ADOPTABLE |
| Edgar | 1823 | Clark | Paris | Joy Fisher |
| Edwards | 1814* | Gallatin, Madison (IT) | Albion | ADOPTABLE |
| Effingham | 1831 | Crawford, Fayette | Effingham | ADOPTABLE |
| Fayette | 1821 | Bond, Clark, Crawford, Jefferson | Vandalia | Penny Lewis |
| Ford | 1859 | unorganized (Vermilion) | Paxton | ADOPTABLE |
| Franklin | 1818* | Gallatin, White | Benton | Sandy Bauer |
| Fulton | 1823 | Pike | Lewistown | ADOPTABLE |
| Gallatin | 1812* | Randolph (IT) | Shawneetown | ADOPTABLE |
| Greene | 1821 | Madison | Carrollton | ADOPTABLE |
| Grundy | 1841 | LaSalle | Morris | Dennis Partridge |
| Hamilton | 1821 | White | McLeansboro | Michael L. Hebert |
| Hancock | 1825 | Pike | Carthage | ADOPTABLE |
| Hardin | 1839 | Gallatin, Pope | Elizabethtown | Sandy Bauer |
| Henderson | 1841 | Warren | Oquawka | ADOPTABLE |
| Henry | 1825 | unorganized (Fulton) | Cambridge | ADOPTABLE |
| Iroquois | 1833 | unorganized (Vermilion) | Watseka | Concetta Phillipps |
| Jackson | 1816* | Johnson, Randolph | Murphysboro | Melissa McCord |
| Jasper | 1831 | Clay, Crawford | Newton | ADOPTABLE |
| Jefferson | 1819 | Edwards, White | Mt. Vernon | Sandy Bauer |
| Jersey | 1839 | Greene | Jerseyville | Dennis Partridge |
| JoDaviess | 1827 | Henry, Putnam | Galena | Andy Willis |
| Johnson | 1812* | Randolph (IT) | Vienna | ADOPTABLE |
| Kane | 1836 | unorganized (LaSalle), Cook | Geneva | ADOPTABLE |
| Kankakee | 1853 | Ford, Iroquois, Will | Kankakee | ADOPTABLE |
| Kendall | 1841 | LaSalle, Kane | Yorkville | ADOPTABLE |
| Knox | 1825 | unorganized (Fulton), Fulton, Henry | Galesburg | ADOPTABLE |
| Lake | 1839 | McHenry | Waukegan | ADOPTABLE |
| LaSalle | 1831 | Putnam, unorganized (Tazewell) | Ottawa | ADOPTABLE |
| Lawrence | 1821 | Crawford, Edwards | Lawrenceville | Mary Kozy |
| Lee | 1839 | Ogle | Dixon | ADOPTABLE |
| Livingston | 1837 | LaSalle, McLean, unorganized (Vermilion?) | Pontiac | ADOPTABLE |
| Logan | 1839 | McLean, Sangamon, Tazewell | Lincoln | Cheryl Rothwell |
| Macon | 1829 | unorganized (Shelby) | Decatur | Cheryl Rothwell |
| Macoupin | 1829 | unorganized (Greene), Madison | Carlinville | Norma Hass |
| Madison | 1812* | St. Clair (IT) | Edwardsville | Bev Bauser |
| Marion | 1823 | Fayette, Jefferson | Salem | Sandy Bauer |
| Marshall | 1839 | Putnam, LaSalle | Lacon | ADOPTABLE |
| Mason | 1841 | Menard, Tazewell | Havana | ADOPTABLE |
| Massac | 1843 | Johnson, Pope | Metropolis | ADOPTABLE |
| McDonough | 1826 | Schuyler | Macomb | ADOPTABLE |
| McHenry | 1836 | Cook, unorganized (LaSalle) | Woodstock | ADOPTABLE |
| McLean | 1830 | Tazewell, unorganized (Tazewell) | Bloomington | ADOPTABLE |
| Menard | 1839 | Sangamon | Petersburg | Cheryl Rothwell |
| Mercer | 1825 | unorganized (Pike) | Aledo | ADOPTABLE |
| Monroe | 1816* | Randolph, St. Clair | Waterloo | Carol Smith |
| Montgomery | 1821 | Bond, Madison | Hillsboro | Carrie "Kay" Wilson |
| Morgan | 1823 | unorganized (Greene), Sangamon | Jacksonville | Dennis Partridge |
| Moultrie | 1843 | Macon, Shelby | Sullivan | ADOPTABLE |
| Ogle | 1836 | Jo Daviess, unorganized (LaSalle) | Oregon | Roger Cramer |
| Peoria | 1825 | Fulton, unorganized (Fulton) | Peoria | ADOPTABLE |
| Perry | 1827 | Jackson, Randolph | Pickneyville | ADOPTABLE |
| Piatt | 1841 | DeWitt, Macon | Monticello | Dee Lund |
| Pike | 1821 | Madison | Pittsfield | ADOPTABLE |
| Pope | 1816* | Gallatin, Johnson | Golconda | Sandy Bauer |
| Pulaski | 1843 | Alexander, Johnson | Mound City | Deborah Cox |
| Putnam | 1825 | unorganized (Edgar, Fulton) | Hennepin | Jennifer Harmon |
| Randolph | 1795* | St. Clair, Northwest Territory | Chester | Dennis Partridge |
| Richland | 1841 | Clay, Lawrence | Olney | ADOPTABLE |
| Rock Island | 1831 | Jo Daviess | Rock Island | ADOPTABLE |
| Saline | 1847 | Gallatin | Harrisburg | ADOPTABLE |
| Sangamon | 1821 | Bond, Madison | Springfield | Cheryl Rothwell |
| Schuyler | 1825 | Pike, unorganized (Pike) | Rushville | Dennis Partridge |
| Scott | 1839 | Morgan | Winchester | ADOPTABLE |
| Shelby | 1827 | Fayette | Shelbyville | ADOPTABLE |
| Stark | 1839 | Knox, Putnam | Toulon | ADOPTABLE |
| St. Clair | 1790* | Northwest Territory | Belleville | ADOPTABLE |
| Stephenson | 1837 | Jo Daviess, Winnebago | Freeport | ADOPTABLE |
| Tazewell | 1827 | unorganized (Peoria), Fayette | Pekin | ADOPTABLE |
| Union | 1818 * | Johnson, Jackson | Jonesboro | Melissa McCord |
| Vermilion | 1826 | unorganized (Edgar) | Danville | ADOPTABLE |
| Wabash | 1824 | Edwards | Mount Carmel | ADOPTABLE |
| Warren | 1825 | unorganized (Pike) | Monmouth | ADOPTABLE |
| Washington | 1818* | St. Clair | Nashville | ADOPTABLE |
| Wayne | 1819 | Edwards | Fairfield | Sandy Bauer |
| White | 1815* | Madison (IT) | Carmi | Cindy Birk-Conley |
| Whiteside | 1836 | Jo Daviess, Henry | Morrison | ADOPTABLE |
| Will | 1836 | Cook, Iroquois | Joliet | Dennis Partridge |
| Williamson | 1839 | Franklin | Marion | ADOPTABLE |
| Winnebago | 1836 | JoDaviess, unorganized (LaSalle) | Rockford | ADOPTABLE |
| Woodford | 1841 | McLean, Tazewell | Eureka | ADOPTABLE |
| PROJECTS |
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| Civil War |
ADOPTABLE | |||
| History |
ADOPTABLE | |||
| References |
ADOPTABLE |
For corrections or additions, please contact me: State Coordinator