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Township/County Lookup** ILGW References Project  | |||||
| County | Map | Date of Formation |
Parent County | County Seat | County Coordinators |
| Adams |  |
1825 | Pike | Quincy | Barbara Freeman Since May 2010 |
| Alexander |  |
1819 | Union | Cairo | Tim Casey Since December 1998 |
| Bond |  |
1818 | Madison | Greenville | Norma Haas Since May 2011 |
| Boone |  |
1836 | Winnebago | Belvidere | Katy Hestand Since September 2003 |
| Brown |  |
1837 | Schuyler | Mount Sterling | Ken & Laurie Huffman Since December 1996 |
| Bureau |  |
1837 | Putnam | Princeton | Adopt Me! |
| Calhoun |  |
1825 | Pike | Hardin | Adopt Me! |
| Carroll |  |
1839 | Jo Daviess | Mount Carroll | Colleen Frank |
| Cass |  |
1837 | Morgan | Virginia | Michelle Bley Since December 1997 |
| Champaign |  |
1833 | Vermilion | Urbana | Celia Snyder Since January 1997 |
| Christian |  |
1839 | Dane (Montgomery, Sangamon, Shelby) | Taylorville | Morgan Edward Johnson Since October 1996 |
| Clark |  |
1819 | Crawford | Marshall | Adopt Me! |
| Clay |  |
1824 | Crawford, Fayette, Wayne | Louisville | Dianna Williams |
| Clinton |  |
1824 | Bond, Washington | Carlyle |
Frankie Heinzmann Dorothy Falk |
| Coles |  |
1830 | Clark, Edgar | Charleston | Linda Lang Since January 1997 |
| Cook |  |
1831 | Putnam | Chicago | Kim Kasprzyk Since April 2001 |
| Crawford |
 |
1816 * | Edwards (IT) | Robinson | Mary Kathryn Kozy Since September 1999 |
| Cumberland |  |
1843 | Coles | Toledo | Michael L. Hébert Since August 1996 |
| 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 Since January 1997 |
| DuPage |  |
1839 | Cook | Wheaton | Jeffrey Bockman & DuPage Co. Genealogical Soc. Since September 1996 |
| Edgar |  |
1823 | Clark | Paris |
Joy Fisher Maggie Stewart |
| Edwards |  |
1814* | Gallatin, Madison (IT) | Albion | Adopt Me! |
| Effingham |  |
1831 | Crawford, Fayette | Effingham | Linda Kralman-Lambert Since March 1997 |
| Fayette |  |
1821 | Bond, Clark, Crawford, Jefferson | Vandalia | Penny Lewis Since November 1999 |
| Ford |  |
1859 | unorganized (Vermilion) | Paxton | Adopt Me! |
| Franklin |  |
1818* | Gallatin, White | Benton | Susan Dorris Since August 2011 |
| Fulton |  |
1823 | Pike | Lewistown | Julie Tarr Since October 2008 |
| Gallatin |  |
1812* | Randolph (IT) | Shawneetown | Adopt Me! |
| Greene |  |
1821 | Madison | Carrollton | Norma Haas Since February 2012 |
| Grundy |  |
1841 | LaSalle | Morris | Deb Haines Since August 1998 |
| Hamilton |  |
1821 | White | McLeansboro | Michael L. Hébert Since August 1996 |
| Hancock |  |
1825 | Pike | Carthage | Douglas Maag Since January 2012 |
| Hardin |  |
1839 | Gallatin, Pope | Elizabethtown | Adopt Me! |
| Henderson |  |
1841 | Warren | Oquawka | Adopt Me! |
| Henry |  |
1825 | unorganized (Fulton) | Cambridge | Adopt Me! |
| Iroquois |  |
1833 | unorganized (Vermilion) | Watseka | Concetta Phillipps |
| Jackson |  |
1816* | Johnson, Randolph | Murphysboro | Karen Allison Since January 2012 |
| Jasper |  |
1831 | Clay, Crawford | Newton | Linda Lambert |
| Jefferson |  |
1819 | Edwards, White | Mt. Vernon | Adopt Me! |
| Jersey |  |
1839 | Greene | Jerseyville | Sheri Iamele Since January 2012 |
| JoDaviess |  |
1827 | Henry, Putnam | Galena |
Karlene Nesbitt White Colleen Frank |
| Johnson |  |
1812* | Randolph (IT) | Vienna | Tim Casey Since December 1998 |
| Kane |  |
1836 | unorganized (LaSalle), Cook | Geneva | Marcia Holpuch Since October 1997 |
| Kankakee |  |
1853 | Ford, Iroquois, Will | Kankakee | William Dunavin-Dunn Since January 2012 |
| Kendall |  |
1841 | LaSalle, Kane | Yorkville | Elmer Dickson Since January 1997 |
| Knox |  |
1825 | unorganized (Fulton), Fulton, Henry | Galesburg | Adopt Me! |
| Knox | . | * | Northwest Territory | extinct | See Knox Above |
| Lake |  |
1839 | McHenry | Waukegan | Joe Markovich Since January 2012 |
| LaSalle |  |
1831 | Putnam, unorganized (Tazewell) | Ottawa | Adopt Me!
Interim Coordinator: 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 Since February 1997 |
| Logan |  |
1839 | McLean, Sangamon, Tazewell | Lincoln | Cheryl Rothwell Since April 1998 |
| 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 Since January 1998 |
| Marshall |  |
1839 | Putnam, LaSalle | Lacon | Norma Haas Since April 2011 |
| Mason |  |
1841 | Menard, Tazewell | Havana | Donna Mayer Since November 2008 |
| Massac |  |
1843 | Johnson, Pope | Metropolis | Adopt Me!
Interim Coordinator: Barbara Freeman |
| McDonough |  |
1826 | Schuyler | Macomb | Adopt Me!
Interim Coordinator: Cheryl Rothwell |
| McHenry |  |
1836 | Cook, unorganized (LaSalle) | Woodstock | Joe Markovich |
| McLean |  |
1830 | Tazewell, unorganized (Tazewell) | Bloomington | Carol Genung |
| Menard |  |
1839 | Sangamon | Petersburg | Jeanne Weaver Since November 1997 |
| Mercer |  |
1825 | unorganized (Pike) | Aledo | Joe Markovich |
| Monroe |  |
1816* | Randolph, St. Clair | Waterloo | Adopt Me! |
| Montgomery |  |
1821 | Bond, Madison | Hillsboro | Tim Casey Since December 1998 |
| Morgan |  |
1823 | unorganized (Greene), Sangamon | Jacksonville | Adopt Me!
Interim Coordinator: Gloria Frazier |
| Moultrie |  |
1843 | Macon, Shelby | Sullivan | Greg Hamblin Since March 2003 |
| 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 Since December 1999 |
| Pope |  |
1816* | Gallatin, Johnson | Golconda | Ginger Hayes Since February 1997 |
| Pulaski |  |
1843 | Alexander, Johnson | Mound City | Tim Casey |
| Putnam |  |
1825 | unorganized (Edgar, Fulton) | Hennepin | Adopt Me! |
| Randolph |  |
1795* | St. Clair, Northwest Territory | Chester | Adopt Me! |
| Richland |  |
1841 | Clay, Lawrence | Olney | Adopt Me! |
| Rock Island |  |
1831 | Jo Daviess | Rock Island | Joe Markovich |
| Saline |  |
1847 | Gallatin | Harrisburg | Adopt Me! |
| Sangamon |  |
1821 | Bond, Madison | Springfield | Adopt Me!
Interim Coordinator: Cheryl Rothwell |
| Schuyler |  |
1825 | Pike, unorganized (Pike) | Rushville | Ken Huffman |
| Scott |  |
1839 | Morgan | Winchester | Barbara Freeman Since May 2010 |
| Shelby |  |
1827 | Fayette | Shelbyville | Tim Casey Since December 1998 |
| Stark |  |
1839 | Knox, Putnam | Toulon | Adopt Me!
Interim Coordinator: Cheryl Rothwell |
| St. Clair |  |
1790* | Northwest Territory | Belleville | Adopt Me!
Interim Coordinator: Diane Walsh |
| Stephenson |  |
1837 | Jo Daviess, Winnebago | Freeport | Adopt Me! |
| 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 Since January 1997 |
| Washington |  |
1818* | St. Clair | Nashville | Wayne Hinton |
| Wayne |  |
1819 | Edwards | Fairfield | Dianna Williams Since February 1999 |
| White |  |
1815* | Madison (IT) | Carmi | Cindy Birk-Conley Since February 2000 |
| Whiteside |  |
1836 | Jo Daviess, Henry | Morrison | Joe Markovich |
| Will |  |
1836 | Cook, Iroquois | Joliet | Adopt Me!
Interim Coordinator: Deb Haines |
| Williamson |  |
1839 | Franklin | Marion | Angela Place Since July 1996 |
| Winnebago |  |
1836 | JoDaviess, unorganized (LaSalle) | Rockford | Katy Hestand Since September 2003 |
| Woodford |  |
1841 | McLean, Tazewell | Eureka | Adopt Me!
Interim Coordinator: Carol Genung |
| Civil War Project |
Jim Willison |
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| Illinois & Michigan Canal |
Nancy Thornton |
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| Illinois History Project |
Celia Snyder |
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| Unknown | . | . | . | . | Karima Allison |
DEFINITIONS: *county formed before Illinois became a state (IT) Illinois Territory | |||||
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