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About the map

Illinois Map Extent

This Illinois county map displays its 102 counties. Illinois’ high number of counties ranks 7th highest in the United States falling behind just Texas, Georgia, VirginiaKentuckyMissouri and Kansas.

Cook County has the highest population in Illinois with over 5 million people. In fact, Cook County is the second-most populated county in the United States just behind Los Angeles County in California.

The largest county in size is McLean County at 1186.3 square miles in area. Then, this is followed by La Salle, Iroquois, and Livingston County. But the smallest county in Idaho is Putnam County just 172.3 square miles in area.

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Illinois county map

County Name Population (2020 est) County Map Area (sq mi) Locator Map FIPS Code
Adams County 64,783
Adams County Map Illinois Locator
Adams County Map
871.4
Adams County Map Illinois
Adams County Map Illinois
17001
Alexander County 5,497
Alexander County Map Illinois Locator
Alexander County Map
252
Alexander County Map Illinois
Alexander County Map Illinois
17003
Bond County 16,262
Bond County Map Illinois Locator
Bond County Map
386.1
Bond County Map Illinois
Bond County Map Illinois
17005
Boone County 52,777
Boone County Map Illinois Locator
Boone County Map
282.1
Boone County Map Illinois
Boone County Map Illinois
17007
Brown County 6,546
Brown County Map Illinois Locator
Brown County Map
307.2
Brown County Map Illinois
Brown County Map Illinois
17009
Bureau County 32,303
Bureau County Map Illinois Locator
Bureau County Map
873.5
Bureau County Map Illinois
Bureau County Map Illinois
17011
Calhoun County 4,616
Calhoun County Map Illinois Locator
Calhoun County Map
280.3
Calhoun County Map Illinois
Calhoun County Map Illinois
17013
Carroll County 14,241
Carroll County Map Illinois Locator
Carroll County Map
465.8
Carroll County Map Illinois
Carroll County Map Illinois
17015
Cass County 11,925
Cass County Map Illinois Locator
Cass County Map
383.7
Cass County Map Illinois
Cass County Map Illinois
17017
Champaign County 209,192
Champaign County Map Illinois Locator
Champaign County Map
997.5
Champaign County Map Illinois
Champaign County Map Illinois
17019
Christian County 32,075
Christian County Map Illinois Locator
Christian County Map
715.8
Christian County Map Illinois
Christian County Map Illinois
17021
Clark County 15,268
Clark County Map Illinois Locator
Clark County Map
504.9
Clark County Map Illinois
Clark County Map Illinois
17023
Clay County 13,079
Clay County Map Illinois Locator
Clay County Map
469.5
Clay County Map Illinois
Clay County Map Illinois
17025
Clinton County 37,398
Clinton County Map Illinois Locator
Clinton County Map
503.8
Clinton County Map Illinois
Clinton County Map Illinois
17027
Coles County 50,383
Coles County Map Illinois Locator
Coles County Map
510.1
Coles County Map Illinois
Coles County Map Illinois
17029
Cook County 5,108,284
Cook County Map Illinois Locator
Cook County Map
958.2
Cook County Map Illinois
Cook County Map Illinois
17031
Crawford County 18,512
Crawford County Map Illinois Locator
Crawford County Map
445.9
Crawford County Map Illinois
Crawford County Map Illinois
17033
Cumberland County 10,649
Cumberland County Map Illinois Locator
Cumberland County Map
347
Cumberland County Map Illinois
Cumberland County Map Illinois
17035
De Witt County 15,368
DeKalb County Map Illinois Locator
DeKalb County Map
405.1
DeKalb County Map Illinois
DeKalb County Map Illinois
17039
DeKalb County 104,491
De Witt County Map Illinois Locator
De Witt County Map
634.6
De Witt County Map Illinois
De Witt County Map Illinois
17037
Douglas County 19,510
Douglas County Map Illinois Locator
Douglas County Map
417.4
Douglas County Map Illinois
Douglas County Map Illinois
17041
DuPage County 917,481
DuPage County Map Illinois Locator
DuPage County Map
336.5
DuPage County Map Illinois
DuPage County Map Illinois
17043
Edgar County 16,858
Edgar County Map Illinois Locator
Edgar County Map
624
Edgar County Map Illinois
Edgar County Map Illinois
17045
Edwards County 6,356
Edwards County Map Illinois Locator
Edwards County Map
222.6
Edwards County Map Illinois
Edwards County Map Illinois
17047
Effingham County 34,065
Effingham County Map Illinois Locator
Effingham County Map
479.9
Effingham County Map Illinois
Effingham County Map Illinois
17049
Fayette County 21,264
Fayette County Map Illinois Locator
Fayette County Map
722.1
Fayette County Map Illinois
Fayette County Map Illinois
17051
Ford County 12,949
Ford County Map Illinois Locator
Ford County Map
486.1
Ford County Map Illinois
Ford County Map Illinois
17053
Franklin County 38,060
Franklin County Map Illinois Locator
Franklin County Map
431.5
Franklin County Map Illinois
Franklin County Map Illinois
17055
Fulton County 33,690
Fulton County Map Illinois Locator
Fulton County Map
882.6
Fulton County Map Illinois
Fulton County Map Illinois
17057
Gallatin County 4,793
Gallatin County Map Illinois Locator
Gallatin County Map
328.2
Gallatin County Map Illinois
Gallatin County Map Illinois
17059
Greene County 12,702
Greene County Map Illinois Locator
Greene County Map
547.2
Greene County Map Illinois
Greene County Map Illinois
17061
Grundy County 50,993
Grundy County Map Illinois Locator
Grundy County Map
430.4
Grundy County Map Illinois
Grundy County Map Illinois
17063
Hamilton County 8,084
Hamilton County Map Illinois Locator
Hamilton County Map
435.9
Hamilton County Map Illinois
Hamilton County Map Illinois
17065
Hancock County 17,422
Hancock County Map Illinois Locator
Hancock County Map
813.4
Hancock County Map Illinois
Hancock County Map Illinois
17067
Hardin County 3,808
Hardin County Map Illinois Locator
Hardin County Map
181.6
Hardin County Map Illinois
Hardin County Map Illinois
17069
Henderson County 6,535
Henderson County Map Illinois Locator
Henderson County Map
395.3
Henderson County Map Illinois
Henderson County Map Illinois
17071
Henry County 48,411
Henry County Map Illinois Locator
Henry County Map
825.6
Henry County Map Illinois
Henry County Map Illinois
17073
Iroquois County 26,711
Iroquois County Map Illinois Locator
Iroquois County Map
1119
Iroquois County Map Illinois
Iroquois County Map Illinois
17075
Jackson County 56,675
Jackson County Map Illinois Locator
Jackson County Map
602.4
Jackson County Map Illinois
Jackson County Map Illinois
17077
Jasper County 9,465
Jasper County Map Illinois Locator
Jasper County Map
498.1
Jasper County Map Illinois
Jasper County Map Illinois
17079
Jefferson County 37,235
Jefferson County Map Illinois Locator
Jefferson County Map
583.8
Jefferson County Map Illinois
Jefferson County Map Illinois
17081
Jersey County 21,616
Jersey County Map Illinois Locator
Jersey County Map
377.1
Jersey County Map Illinois
Jersey County Map Illinois
17083
Jo Daviess County 21,239
Jo Daviess County Map Illinois Locator
Jo Daviess County Map
618.6
Jo Daviess County Map Illinois
Jo Daviess County Map Illinois
17085
Johnson County 12,358
Johnson County Map Illinois Locator
Johnson County Map
348.9
Johnson County Map Illinois
Johnson County Map Illinois
17087
Kane County 531,010
Kane County Map Illinois Locator
Kane County Map
524.2
Kane County Map Illinois
Kane County Map Illinois
17089
Kankakee County 108,594
Kankakee County Map Illinois Locator
Kankakee County Map
681.4
Kankakee County Map Illinois
Kankakee County Map Illinois
17091
Kendall County 130,638
Kendall County Map Illinois Locator
Kendall County Map
322.4
Kendall County Map Illinois
Kendall County Map Illinois
17093
Knox County 49,053
Knox County Map Illinois Locator
Knox County Map
719.7
Knox County Map Illinois
Knox County Map Illinois
17095
La Salle County 107,571
Lake County Map Illinois Locator
Lake County Map
1148.3
Lake County Map Illinois
Lake County Map Illinois
17099
Lake County 693,593
La Salle County Map Illinois Locator
La Salle County Map
469.6
La Salle County Map Illinois
La Salle County Map Illinois
17097
Lawrence County 15,467
Lawrence County Map Illinois Locator
Lawrence County Map
374.2
Lawrence County Map Illinois
Lawrence County Map Illinois
17101
Lee County 33,647
Lee County Map Illinois Locator
Lee County Map
729.4
Lee County Map Illinois
Lee County Map Illinois
17103
Livingston County 35,414
Livingston County Map Illinois Locator
Livingston County Map
1045.4
Livingston County Map Illinois
Livingston County Map Illinois
17105
Logan County 28,383
Logan County Map Illinois Locator
Logan County Map
618.9
Logan County Map Illinois
Logan County Map Illinois
17107
Macon County 103,015
Macon County Map Illinois Locator
Macon County Map
585.6
Macon County Map Illinois
Macon County Map Illinois
17115
Macoupin County 44,567
Macoupin County Map Illinois Locator
Macoupin County Map
867.7
Macoupin County Map Illinois
Macoupin County Map Illinois
17117
Madison County 262,635
Madison County Map Illinois Locator
Madison County Map
739.9
Madison County Map Illinois
Madison County Map Illinois
17119
Marion County 37,045
Marion County Map Illinois Locator
Marion County Map
576
Marion County Map Illinois
Marion County Map Illinois
17121
Marshall County 11,309
Marshall County Map Illinois Locator
Marshall County Map
398.5
Marshall County Map Illinois
Marshall County Map Illinois
17123
Mason County 13,173
Mason County Map Illinois Locator
Mason County Map
563.4
Mason County Map Illinois
Mason County Map Illinois
17125
Massac County 13,636
Massac County Map Illinois Locator
Massac County Map
241.8
Massac County Map Illinois
Massac County Map Illinois
17127
McDonough County 29,295
McDonough County Map Illinois Locator
McDonough County Map
590.1
McDonough County Map Illinois
McDonough County Map Illinois
17109
McHenry County 305,888
McHenry County Map Illinois Locator
McHenry County Map
611.1
McHenry County Map Illinois
McHenry County Map Illinois
17111
McLean County 171,256
McLean County Map Illinois Locator
McLean County Map
1186.3
McLean County Map Illinois
McLean County Map Illinois
17113
Menard County 12,068
Menard County Map Illinois Locator
Menard County Map
315.4
Menard County Map Illinois
Menard County Map Illinois
17129
Mercer County 15,225
Mercer County Map Illinois Locator
Mercer County Map
568.9
Mercer County Map Illinois
Mercer County Map Illinois
17131
Monroe County 34,739
Monroe County Map Illinois Locator
Monroe County Map
397.8
Monroe County Map Illinois
Monroe County Map Illinois
17133
Montgomery County 28,045
Montgomery County Map Illinois Locator
Montgomery County Map
709.6
Montgomery County Map Illinois
Montgomery County Map Illinois
17135
Morgan County 33,400
Morgan County Map Illinois Locator
Morgan County Map
572.2
Morgan County Map Illinois
Morgan County Map Illinois
17137
Moultrie County 14,347
Moultrie County Map Illinois Locator
Moultrie County Map
344.5
Moultrie County Map Illinois
Moultrie County Map Illinois
17139
Ogle County 50,306
Ogle County Map Illinois Locator
Ogle County Map
763.2
Ogle County Map Illinois
Ogle County Map Illinois
17141
Peoria County 177,652
Peoria County Map Illinois Locator
Peoria County Map
633.4
Peoria County Map Illinois
Peoria County Map Illinois
17143
Perry County 20,664
Perry County Map Illinois Locator
Perry County Map
446.8
Perry County Map Illinois
Perry County Map Illinois
17145
Piatt County 16,355
Piatt County Map Illinois Locator
Piatt County Map
440.2
Piatt County Map Illinois
Piatt County Map Illinois
17147
Pike County 15,239
Pike County Map Illinois Locator
Pike County Map
848.1
Pike County Map Illinois
Pike County Map Illinois
17149
Pope County 4,142
Pope County Map Illinois Locator
Pope County Map
374.7
Pope County Map Illinois
Pope County Map Illinois
17151
Pulaski County 5,201
Pulaski County Map Illinois Locator
Pulaski County Map
207.9
Pulaski County Map Illinois
Pulaski County Map Illinois
17153
Putnam County 5,716
Putnam County Map Illinois Locator
Putnam County Map
172.3
Putnam County Map Illinois
Putnam County Map Illinois
17155
Randolph County 31,351
Randolph County Map Illinois Locator
Randolph County Map
597.9
Randolph County Map Illinois
Randolph County Map Illinois
17157
Richland County 15,507
Richland County Map Illinois Locator
Richland County Map
362
Richland County Map Illinois
Richland County Map Illinois
17159
Rock Island County 140,907
Rock Island County Map Illinois Locator
Rock Island County Map
451.1
Rock Island County Map Illinois
Rock Island County Map Illinois
17161
Saint Clair County 258,046
Saint Clair County Map Illinois Locator
Saint Clair County Map
674.1
Saint Clair County Map Illinois
Saint Clair County Map Illinois
17163
Saline County 23,182
Saline County Map Illinois Locator
Saline County Map
386.8
Saline County Map Illinois
Saline County Map Illinois
17165
Sangamon County 193,882
Sangamon County Map Illinois Locator
Sangamon County Map
876.9
Sangamon County Map Illinois
Sangamon County Map Illinois
17167
Schuyler County 6,738
Schuyler County Map Illinois Locator
Schuyler County Map
441.4
Schuyler County Map Illinois
Schuyler County Map Illinois
17169
Scott County 4,950
Scott County Map Illinois Locator
Scott County Map
253.3
Scott County Map Illinois
Scott County Map Illinois
17171
Shelby County 21,299
Shelby County Map Illinois Locator
Shelby County Map
768.1
Shelby County Map Illinois
Shelby County Map Illinois
17173
Stark County 5,262
Stark County Map Illinois Locator
Stark County Map
288.3
Stark County Map Illinois
Stark County Map Illinois
17175
Stephenson County 43,831
Stephenson County Map Illinois Locator
Stephenson County Map
564.7
Stephenson County Map Illinois
Stephenson County Map Illinois
17177
Tazewell County 130,777
Tazewell County Map Illinois Locator
Tazewell County Map
657.2
Tazewell County Map Illinois
Tazewell County Map Illinois
17179
Union County 16,498
Union County Map Illinois Locator
Union County Map
422.3
Union County Map Illinois
Union County Map Illinois
17181
Vermilion County 74,855
Vermilion County Map Illinois Locator
Vermilion County Map
901.7
Vermilion County Map Illinois
Vermilion County Map Illinois
17183
Wabash County 11,190
Wabash County Map Illinois Locator
Wabash County Map
227.6
Wabash County Map Illinois
Wabash County Map Illinois
17185
Warren County 16,696
Warren County Map Illinois Locator
Warren County Map
543.1
Warren County Map Illinois
Warren County Map Illinois
17187
Washington County 13,764
Washington County Map Illinois Locator
Washington County Map
563.7
Washington County Map Illinois
Washington County Map Illinois
17189
Wayne County 16,031
Wayne County Map Illinois Locator
Wayne County Map
715.5
Wayne County Map Illinois
Wayne County Map Illinois
17191
White County 13,364
White County Map Illinois Locator
White County Map
501.8
White County Map Illinois
White County Map Illinois
17193
Whiteside County 54,656
Whiteside County Map Illinois Locator
Whiteside County Map
696.7
Whiteside County Map Illinois
Whiteside County Map Illinois
17195
Will County 688,726
Will County Map Illinois Locator
Will County Map
849.4
Will County Map Illinois
Will County Map Illinois
17197
Williamson County 66,415
Williamson County Map Illinois Locator
Williamson County Map
444.3
Williamson County Map Illinois
Williamson County Map Illinois
17199
Winnebago County 281,295
Winnebago County Map Illinois Locator
Winnebago County Map
519.3
Winnebago County Map Illinois
Winnebago County Map Illinois
17201
Woodford County 38,091
Woodford County Map Illinois Locator
Woodford County Map
540.8
Woodford County Map Illinois
Woodford County Map Illinois
17203

References

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