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County

Date of
Formation

Parent County

County Seat
Unknown      
Adams 1825 Pike Quincy
Alexander 1819 Union Cairo
Bond 1818 Madison Greenville
Boone 1836 Winnebago Belvidere
Brown 1837 Schuyler Mount Sterling
Bureau 1837 Putnam Princeton
Calhoun
 
1825 Pike Hardin
Carroll 1839 Jo Daviess Mount Carroll
Cass 1837 Morgan Virginia
Champaign 1833 Vermilion Urbana
Christian 1839 Dane (Montgomery, Sangamon, Shelby) Taylorville
Clark 1819 Crawford Marshall
Clay 1824 Crawford, Fayette, Wayne Louisville
Clinton 1824 Bond, Washington Carlyle
Coles 1830 Clark, Edgar Charleston
Cook
Katy Hestand
1831 Putnam Chicago
Crawford
 
1816 Edwards (IT) Robinson
Cumberland 1843 Coles Toledo
Dane 1839 Montgomery, Sangamon, Shelby Extinct - 1840
Now Christian
DeKalb 1837 Kane Sycamore
DeWitt 1839 Macon, McLean Clinton
Douglas 1859 Coles Tuscola
DuPage 1839 Cook Wheaton
Edgar 1823 Clark Paris
Edwards 1814 Gallatin, Madison (IT) Albion
Effingham 1831 Crawford, Fayette Effingham
Fayette 1821 Bond, Clark, Crawford, Jefferson Vandalia
Ford 1859 unorganized (Vermilion) Paxton
Franklin 1818* Gallatin, White Benton
Fulton 1823 Pike Lewistown
Gallatin 1812 Randolph (IT) Shawneetown
Greene 1821 Madison Carrollton
Grundy 1841 LaSalle Morris
Hamilton 1821 White McLeansboro
Hancock 1825 Pike Carthage
Hardin 1839 Gallatin, Pope Elizabethtown
Henderson
Gail Kilgore
1841 Warren Oquawka
Henry 1825 unorganized (Fulton) Cambridge
Iroquois 1833 unorganized (Vermilion) Watseka
Jackson 1816 Johnson, Randolph Murphysboro
Jasper 1831 Clay, Crawford Newton
Jefferson 1819 Edwards, White Mt. Vernon
Jersey 1839 Greene Jerseyville
JoDaviess
Jeannie Hicks
1827 Henry, Putnam Galena
Johnson 1812 Randolph (IT) Vienna
Kane 1836 unorganized (LaSalle), Cook Geneva
Kankakee 1853 Ford, Iroquois, Will Kankakee
Kendall 1841 LaSalle, Kane Yorkville
Knox 1825 unorganized (Fulton), Fulton, Henry Galesburg
Knox   Northwest Territory extinct

Lake Rootsweb

Lake Onsite

1839 McHenry Waukegan
LaSalle 1831 Putnam, unorganized (Tazewell) Ottawa
Lawrence 1821 Crawford, Edwards Lawrenceville
Lee 1839 Ogle Dixon
Livingston 1837 LaSalle, McLean, unorganized (Vermilion?) Pontiac
Logan
Gail Kilgore
1839 McLean, Sangamon, Tazewell Lincoln
Macon 1829 unorganized (Shelby) Decatur
Macoupin 1829 unorganized (Greene), Madison Carlinville
Madison 1812 St. Clair (IT) Edwardsville
Marion 1823 Fayette, Jefferson Salem
Marshall 1839 Putnam, LaSalle Lacon
Mason 1841 Menard, Tazewell Havana
Massac 1843 Johnson, Pope Metropolis
McDonough 1826 Schuyler Macomb
McHenry 1836 Cook, unorganized (LaSalle) Woodstock
McLean 1830 Tazewell, unorganized (Tazewell) Bloomington
Menard 1839 Sangamon Petersburg
Mercer 1825 unorganized (Pike) Aledo
Monroe 181 Randolph, St. Clair Waterloo
Montgomery 1821 Bond, Madison Hillsboro
Morgan 1823 unorganized (Greene), Sangamon Jacksonville
Moultrie 1843 Macon, Shelby Sullivan
Ogle
Gail Kilgore
1836 Jo Daviess, unorganized (LaSalle) Oregon
Peoria 1825 Fulton, unorganized (Fulton) Peoria
Perry 1827 Jackson, Randolph Pickneyville
Piatt
Katy Hestand
1841 DeWitt, Macon Monticello
Pike 1821 Madison Pittsfield
Pope 1816 Gallatin, Johnson Golconda
Pulaski 1843 Alexander, Johnson Mound City
Putnam 1825 unorganized (Edgar, Fulton) Hennepin
Randolph 1795 St. Clair, Northwest Territory Chester
Richland 1841 Clay, Lawrence Olney
Rock Island 1831 Jo Daviess Rock Island
Saline 1847 Gallatin Harrisburg
Sangamon 1821 Bond, Madison Springfield
Schuyler 1825 Pike, unorganized (Pike) Rushville
Scott 1839 Morgan Winchester
Shelby 1827 Fayette Shelbyville
Stark 1839 Knox, Putnam Toulon
St. Clair 1790 Northwest Territory Belleville
Stephenson
Gail Meyer Kilgore
1837 Jo Daviess, Winnebago Freeport
Tazewell 1827 unorganized (Peoria), Fayette Pekin
Union 1818 Johnson, Jackson Jonesboro
Vermilion 1826 unorganized (Edgar) Danville
Wabash 1824 Edwards Mount Carmel
Warren 1825 unorganized (Pike) Monmouth
Washington 1818 St. Clair Nashville
Wayne 1819 Edwards Fairfield
White 1815 Madison (IT) Carmi
Whiteside 1836 Jo Daviess, Henry Morrison
Will 1836 Cook, Iroquois Joliet
Williamson 1839 Franklin Marion
Winnebago 1836 JoDaviess, unorganized (LaSalle) Rockford
Woodford 1841 McLean, Tazewell Eureka
     
This page was created 21-aug-12 ©Copyright 2012 by K. Hestand You may link to these pages, however you may not use any page on this site without written permission of the State Coordinator