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Township/County Lookup ** ILGW References Project  |
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| County | Map | Date of Formation |
Parent County | County Seat | County Coordinators |
| Unknown | . | . | . | . | Karima Allison |
| Adams |  |
1825 | Pike | Quincy | Barbara Freeman |
| Alexander |  |
1819 | Union | Cairo | Tim Casey |
| Bond |  |
1818 | Madison | Greenville | Michael Hubbard |
| Boone |  |
1836 | Winnebago | Belvidere | Katy Hestand |
| Brown |  |
1837 | Schuyler | Mount Sterling | Ken & Laurie Huffman |
| Bureau |  |
1837 | Putnam | Princeton | Adopt Me! |
| Calhoun |
 |
1825 | Pike | Hardin | Adoption Pending |
| Carroll |  |
1839 | Jo Daviess | Mount Carroll | Colleen Frank |
| Cass |  |
1837 | Morgan | Virginia | Michelle Bley |
| Champaign |  |
1833 | Vermilion | Urbana | Celia Snyder |
| Christian |  |
1839 | Dane (Montgomery, Sangamon, Shelby) | Taylorville | Morgan Edward Johnson |
| Clark |  |
1819 | Crawford | Marshall | Fred Finkbiner |
| Clay |  |
1824 | Crawford, Fayette, Wayne | Louisville | Dianna Williams |
| Clinton |  |
1824 | Bond, Washington | Carlyle | Frankie Heinzmann & Dorothy Falk |
| Coles |  |
1830 | Clark, Edgar | Charleston | Linda Lang |
| Cook |  |
1831 | Putnam | Chicago | Kim Kasprzyk |
| Crawford |
 |
1816 * | Edwards (IT) | Robinson | Mary Kathryn Kozy |
| Cumberland |  |
1843 | Coles | Toledo | Michael L. Hébert |
| Dane | . | 1839 | Montgomery, Sangamon, Shelby | Extinct - 1840 Now Christian |
See Christian County |
| DeKalb |  |
1837 | Kane | Sycamore | Sheri Baker |
| DeWitt |  |
1839 | Macon, McLean | Clinton | Judy Simpson |
| Douglas |  |
1859 | Coles | Tuscola | Linda Lang |
| DuPage |  |
1839 | Cook | Wheaton | Jeffrey Bockman & DuPage Co. Genealogical Soc. |
| Edgar |  |
1823 | Clark | Paris | Joy Fisher & Maggie Stewart |
| Edwards |  |
1814* | Gallatin, Madison (IT) | Albion | Adopt Me! |
| Effingham |  |
1831 | Crawford, Fayette | Effingham | Linda Kralman-Lambert |
| Fayette |  |
1821 | Bond, Clark, Crawford, Jefferson | Vandalia | Penny Lewis |
| Ford |  |
1859 | unorganized (Vermilion) | Paxton | Adopt Me! |
| Franklin |  |
1818* | Gallatin, White | Benton | Lynne Johnston Westra |
| Fulton |  |
1823 | Pike | Lewistown | Julie Tarr |
| Gallatin |  |
1812* | Randolph (IT) | Shawneetown | Adopt Me! |
| Greene |  |
1821 | Madison | Carrollton | Marty Crull |
| Grundy |  |
1841 | LaSalle | Morris | Deb Haines |
| Hamilton |  |
1821 | White | McLeansboro | Michael L. Hébert |
| Hancock |  |
1825 | Pike | Carthage | Susan Cheney |
| Hardin |  |
1839 | Gallatin, Pope | Elizabethtown | Adopt Me! |
| Henderson |  |
1841 | Warren | Oquawka | Jean Crowl |
| Henry |  |
1825 | unorganized (Fulton) | Cambridge | Adopt Me! |
| Iroquois |  |
1833 | unorganized (Vermilion) | Watseka | Concetta Phillipps |
| Jackson |  |
1816* | Johnson, Randolph | Murphysboro | Adopt Me! |
| Jasper |  |
1831 | Clay, Crawford | Newton | Linda Lambert |
| Jefferson |  |
1819 | Edwards, White | Mt. Vernon | Cindy Ford |
| Jersey |  |
1839 | Greene | Jerseyville | Adoption Pending |
| JoDaviess |  |
1827 | Henry, Putnam | Galena | Karlene Nesbitt White & Colleen Frank |
| Johnson |  |
1812* | Randolph (IT) | Vienna | Tim Casey |
| Kane |  |
1836 | unorganized (LaSalle), Cook | Geneva | Marcia Holpuch |
| Kankakee |  |
1853 | Ford, Iroquois, Will | Kankakee | Lee Hollenbeck |
| Kendall |  |
1841 | LaSalle, Kane | Yorkville | Elmer Dickson |
| Knox |  |
1825 | unorganized (Fulton), Fulton, Henry | Galesburg | Adopt Me! |
| Knox | . | * | Northwest Territory | extinct | See Knox Above |
| Lake |  |
1839 | McHenry | Waukegan | Debbie Mieszala & Lake Co IL Gen Soc |
| LaSalle |  |
1831 | Putnam, unorganized (Tazewell) | Ottawa | Annette Liptak |
| Lawrence |  |
1821 | Crawford, Edwards | Lawrenceville | Allison Mushrush |
| Lee |  |
1839 | Ogle | Dixon | Gordon Johnson & Lee County Genealogical Society |
| Livingston |  |
1837 | LaSalle, McLean, unorganized (Vermilion?) | Pontiac | Annette Liptak |
| Logan |  |
1839 | McLean, Sangamon, Tazewell | Lincoln | Cheryl Rothwell |
| Macon |  |
1829 | unorganized (Shelby) | Decatur | Gayle Pace Jones |
| Macoupin |  |
1829 | unorganized (Greene), Madison | Carlinville | Gloria Frazier & Kathleen Mirabella |
| Madison |  |
1812* | St. Clair (IT) | Edwardsville | Bev Bauser |
| Marion |  |
1823 | Fayette, Jefferson | Salem | Kim Randolph |
| Marshall |  |
1839 | Putnam, LaSalle | Lacon | Adopt Me! |
| Mason |  |
1841 | Menard, Tazewell | Havana | Donna Mayer |
| Massac |  |
1843 | Johnson, Pope | Metropolis | Adopt Me! |
| McDonough |  |
1826 | Schuyler | Macomb | Melissa Calhoun |
| McHenry |  |
1836 | Cook, unorganized (LaSalle) | Woodstock | Joe Markovich |
| McLean |  |
1830 | Tazewell, unorganized (Tazewell) | Bloomington | Carol Genung |
| Menard |  |
1839 | Sangamon | Petersburg | Jeanne Weaver |
| Mercer |  |
1825 | unorganized (Pike) | Aledo | Joe Markovich |
| Monroe |  |
1816* | Randolph, St. Clair | Waterloo | Sharon Hackworth |
| Montgomery |  |
1821 | Bond, Madison | Hillsboro | Tim Casey |
| Morgan |  |
1823 | unorganized (Greene), Sangamon | Jacksonville | Adopt Me! |
| Moultrie |  |
1843 | Macon, Shelby | Sullivan | Greg Hamblin |
| Ogle |  |
1836 | Jo Daviess, unorganized (LaSalle) | Oregon | Roger Cramer |
| Peoria |  |
1825 | Fulton, unorganized (Fulton) | Peoria | Karen Heinrich |
| Perry |  |
1827 | Jackson, Randolph | Pickneyville | Wayne Hinton |
| Piatt |  |
1841 | DeWitt, Macon | Monticello | Dee Lund |
| Pike |  |
1821 | Madison | Pittsfield | Barbara Freeman |
| Pope |  |
1816* | Gallatin, Johnson | Golconda | Ginger Hayes |
| Pulaski |  |
1843 | Alexander, Johnson | Mound City | Tim Casey |
| Putnam |  |
1825 | unorganized (Edgar, Fulton) | Hennepin | Adopt Me! |
| Randolph |  |
1795* | St. Clair, Northwest Territory | Chester | Sharon Hackworth |
| Richland |  |
1841 | Clay, Lawrence | Olney | Scott Burow |
| Rock Island |  |
1831 | Jo Daviess | Rock Island | Joe Markovich |
| Saline |  |
1847 | Gallatin | Harrisburg | Adopt Me! |
| Sangamon |  |
1821 | Bond, Madison | Springfield | Cheryl Rothwell |
| Schuyler |  |
1825 | Pike, unorganized (Pike) | Rushville | Ken Huffman |
| Scott |  |
1839 | Morgan | Winchester | Barbara Freeman |
| Shelby |  |
1827 | Fayette | Shelbyville | Tim Casey & Sue Tolbert |
| Stark |  |
1839 | Knox, Putnam | Toulon | Adopt Me! |
| St. Clair |  |
1790* | Northwest Territory | Belleville | Diane Walsh |
| Stephenson |  |
1837 | Jo Daviess, Winnebago | Freeport | Karen Smith-Schottenbauer |
| Tazewell |  |
1827 | unorganized (Peoria), Fayette | Pekin | Joe Markovich |
| Union |  |
1818 * | Johnson, Jackson | Jonesboro | Tim Casey |
| Vermilion |  |
1826 | unorganized (Edgar) | Danville | Joe Markovich |
| Wabash |  |
1824 | Edwards | Mount Carmel | Adopt Me! |
| Warren |  |
1825 | unorganized (Pike) | Monmouth | Kathleen Calkin |
| Washington |  |
1818* | St. Clair | Nashville | Wayne Hinton |
| Wayne |  |
1819 | Edwards | Fairfield | Dianna Williams |
| White |  |
1815* | Madison (IT) | Carmi | Cindy Birk-Conley |
| Whiteside |  |
1836 | Jo Daviess, Henry | Morrison | Joe Markovich |
| Will |  |
1836 | Cook, Iroquois | Joliet | Deb Haines |
| Williamson |  |
1839 | Franklin | Marion | Angela Place |
| Winnebago |  |
1836 | JoDaviess, unorganized (LaSalle) | Rockford | Katy Hestand |
| Woodford |  |
1841 | McLean, Tazewell | Eureka | Carol Genung |
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DEFINITIONS: *county formed before Illinois became a state (IT) Illinois Territory |
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The ILGenWeb ProjectDeb Haines, State Coordinator Morgan Johnson, Asst. State Coordinator Cheryl Rothwell, Asst. State Coordinator The 1790 IL Map used in the banner courtesy of Michael L. Hébert, ILGenWeb Cumberland County Coordinator. |
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