| |
|
| County |
2000 Population |
Square Miles |
County Seat |
|
Adams County |
68,277 |
857 |
Quincy |
|
Alexander County |
9,590 |
236 |
Cairo |
|
Bond County |
17,633 |
380 |
Greenville |
|
Boone County |
41,786 |
281 |
Belvidere |
|
Brown County |
6,950 |
306 |
Mount Sterling |
|
Bureau County |
35,503 |
869 |
Princeton |
|
Calhoun County |
5,084 |
254 |
Hardin |
|
Carroll County |
16,674 |
444 |
Mount Carroll |
|
Cass County |
13,695 |
376 |
Virginia |
|
Champaign County |
179,669 |
997 |
Urbana |
|
Christian County |
35,372 |
709 |
Taylorville |
|
Clark County |
17,008 |
502 |
Marshall |
|
Clay County |
14,560 |
469 |
Louisville |
|
Clinton County |
35,535 |
474 |
Carlyle |
|
Coles County |
53,196 |
508 |
Charleston |
|
Cook County |
5,376,741 |
946 |
Chicago |
|
Crawford County |
20,452 |
444 |
Robinson |
|
Cumberland County |
11,253 |
346 |
Toledo |
|
De Witt County |
16,798 |
398 |
Clinton |
|
DeKalb County |
88,969 |
634 |
Sycamore |
|
Douglas County |
19,922 |
417 |
Tuscola |
|
Du Page County |
904,161 |
334 |
Wheaton |
|
Edgar County |
19,704 |
624 |
Paris |
|
Edwards County |
6,971 |
222 |
Albion |
|
Effingham County |
34,264 |
479 |
Effingham |
|
Fayette County |
21,802 |
716 |
Vandalia |
|
Ford County |
14,241 |
486 |
Paxton |
|
Franklin County |
39,018 |
412 |
Benton |
|
Fulton County |
38,250 |
866 |
Lewistown |
|
Gallatin County |
6,445 |
324 |
Shawneetown |
|
Greene County |
14,761 |
543 |
Carrollton |
|
Grundy County |
37,535 |
420 |
Morris |
|
Hamilton County |
8,621 |
435 |
McLeansboro |
|
Hancock County |
20,121 |
795 |
Carthage |
|
Hardin County |
4,800 |
178 |
Elizabethtown |
|
Henderson County |
8,213 |
379 |
Oquawka |
|
Henry County |
51,020 |
823 |
Cambridge |
|
Iroquois County |
31,334 |
1,116 |
Watseka |
|
Jackson County |
59,612 |
588 |
Murphysboro |
|
Jasper County |
10,117 |
494 |
Newton |
|
Jefferson County |
40,045 |
571 |
Mount Vernon |
|
Jersey County |
21,668 |
369 |
Jerseyville |
|
Jo Daviess County |
22,289 |
601 |
Galena |
|
Johnson County |
12,878 |
346 |
Vienna |
|
Kane County |
404,119 |
521 |
Geneva |
|
Kankakee County |
103,833 |
678 |
Kankakee |
|
Kendall County |
54,544 |
321 |
Yorkville |
|
Knox County |
55,836 |
716 |
Galesburg |
|
La Salle County |
111,509 |
1,135 |
Ottawa |
|
Lake County |
644,356 |
448 |
Waukegan |
|
Lawrence County |
15,452 |
372 |
Lawrenceville |
|
Lee County |
36,062 |
725 |
Dixon |
|
Livingston County |
39,678 |
1,044 |
Pontiac |
|
Logan County |
31,183 |
618 |
Lincoln |
|
Macon County |
114,706 |
581 |
Decatur |
|
Macoupin County |
49,019 |
864 |
Carlinville |
|
Madison County |
258,941 |
725 |
Edwardsville |
|
Marion County |
41,691 |
572 |
|
|
Marshall County |
13,180 |
386 |
Lacon |
|
Mason County |
16,038 |
539 |
Havana |
|
Massac County |
15,161 |
239 |
Metropolis |
|
McDonough County |
32,913 |
589 |
Macomb |
|
McHenry County |
260,077 |
604 |
Woodstock |
|
McLean County |
150,433 |
1,184 |
Bloomington |
|
Menard County |
12,486 |
314 |
Petersburg |
|
Mercer County |
16,957 |
561 |
Aledo |
|
Monroe County |
27,619 |
388 |
Waterloo |
|
Montgomery County |
30,652 |
704 |
Hillsboro |
|
Morgan County |
36,616 |
569 |
Jacksonville |
|
Moultrie County |
14,287 |
336 |
Sullivan |
|
Ogle County |
51,032 |
759 |
Oregon |
|
Peoria County |
183,433 |
620 |
Peoria |
|
Perry County |
23,094 |
441 |
Pinckneyville |
|
Piatt County |
16,365 |
440 |
Monticello |
|
Pike County |
17,384 |
830 |
Pittsfield |
|
Pope County |
4,413 |
371 |
Golconda |
|
Pulaski County |
7,348 |
201 |
Mound City |
|
Putnam County |
6,086 |
160 |
Hennepin |
|
Randolph County |
33,893 |
578 |
Chester |
|
Richland County |
16,149 |
360 |
Olney |
|
Rock Island County |
149,374 |
427 |
Rock Island |
|
Saline County |
26,733 |
383 |
Harrisburg |
|
Sangamon County |
188,951 |
868 |
Springfield |
|
Schuyler County |
7,189 |
437 |
Rushville |
|
Scott County |
5,537 |
251 |
Winchester |
|
Shelby County |
22,893 |
759 |
Shelbyville |
|
St. Clair County |
256,082 |
664 |
Belleville |
|
Stark County |
6,332 |
288 |
Toulon |
|
Stephenson County |
48,979 |
564 |
Freeport |
|
Tazewell County |
128,485 |
649 |
Pekin |
|
Union County |
18,293 |
416 |
Jonesboro |
|
Vermilion County |
83,919 |
899 |
Danville |
|
Wabash County |
12,937 |
224 |
Mount Carmel |
|
Warren County |
18,735 |
543 |
Monmouth |
|
Washington County |
15,148 |
563 |
Nashville |
|
Wayne County |
17,151 |
714 |
Fairfield |
|
White County |
15,371 |
495 |
Carmi |
|
Whiteside County |
60,653 |
685 |
Morrison |
|
Will County |
502,266 |
837 |
Joliet |
|
Williamson County |
61,296 |
424 |
Marion |
|
Winnebago County |
278,418 |
514 |
Rockford |
|
Woodford County |
35,469 |
528 |
Eureka |
|
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