Illinois County Boundaries
1790 - Present

Michael L. Hébert

Click on a year to see the Illinois county map for that year.  New counties are listed for each year.  To see all of the maps on one page click 'All' but this may take some time to load.
Most of the information for these maps came from Origin and Evolution of Illinois Counties published by the Secretary of the State of Illinois.  For software that includes county boundary development maps for all U.S. states, you can check out a demo version of AniMap at the Goldbug web site.

1790
(N.W. Terr.)

St.Clair, Knox

1795
(N.W. Terr.)
Randolph

1801
(Indiana Terr.)

1803
(Indiana Terr.)

1809
(Illinois Terr.)
Knox extinct

1812
(Illinois Terr.)
Madison, Gallatin, Johnson

1813
(Illinois Terr.)

1815
(Illinois Terr.)
Edwards (1814), White

1816
(Illinois Terr.)
Monroe, Jackson, Pope, Crawford

1817
(Illinois Terr.)
Bond

1818
(Illinois Terr.)
Franklin, Union, Washington
Statehood

1819
Alexander, Clark, Jefferson, Wayne

1821
Lawrence, Greene, Sangamon, Pike, Hamilton, Montgomery, Fayette

1823
Edgar, Marion, Fulton, Morgan

1824
Clay, Clinton, Wabash

1825
Calhoun, Adams, Hancock, Henry, Knox, Mercer, Peoria, Putnam, Schuyler, Warren

1826
Vermilion, McDonough

1827
Shelby, Perry, Tazewell, JoDaviess

1829
Macoupin, Macon

1831
Coles (1830), McLean (1830), Cook, LaSalle, Rock Island, Effingham, Jasper

1833
Champaign, Iroquois

1836
Will, Kane, McHenry, Ogle, Whiteside, Winnebago

1837
Livingston, Bureau, Cass, Boone, DeKalb, Stephenson

1839
Marshall, Brown, DuPage, Dane / Christian, Logan, Menard, Scott, Carroll, Lee, Jersey, Warren, Williamson, DeWitt, Lake, Hardin, Stark

1841
Henderson, Mason, Piatt, Grundy, Kendall, Richland, Woodford

1843
Massac, Moultrie, Cumberland, Pulaski

1847
Saline

1853
Kankakee

1859
(to present)
Douglas, Ford

All
Load all maps at once (may take a while to load)

 

Other Illinois-related Map Sites

ILGenWeb Map
ILGenWeb Main Page
Cyndi's List of Illinois Map Sites
Historical Maps of the United States
Goldbug - Home of AniMap
John Robertson's Genealogy & Maps


Michael L. Hébert (mhebert.gen@charter.net)
Copyright © 1997-2014.  All rights reserved.

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Michael L. Hebert