Illinois Census Data

  1. Illinois Cities & Towns: Absolute & Relative Change (%) from 2000 to 2009
  2. Illinois Cities & Towns: Population Estimates From 2000 to 2009
  3. Illinois Quick Facts: People, Business & Geography (U.S. Census Bureau)
  4. 2010 Census: Illinois Profile (PDF)

Census Data for Illinois Counties

(Links below lead to Quick Facts for Illinois Counties: People, Business & Geography at U.S. Census Bureau.)

Area 7/1/2009 7/1/2008 7/1/2007 7/1/2006 7/1/2005 7/1/2004 7/1/2003 7/1/2002 7/1/2001 7/1/2000 Census 2000
Illinois 12,910,409 12,842,954 12,779,417 12,718,011 12,674,452 12,645,295 12,597,981 12,558,229 12,507,833 12,437,645 12,419,293
Adams County 67,054 66,895 66,840 66,922 66,750 66,724 67,188 67,765 68,040 68,220 68,277
Alexander County 7,914 8,112 8,206 8,410 8,629 8,938 9,038 9,398 9,443 9,584 9,590
Bond County 18,103 18,185 18,312 18,143 18,120 18,243 18,062 17,794 17,608 17,650 17,633
Boone County 54,020 53,892 53,162 51,472 49,455 47,693 46,089 44,508 43,187 42,053 41,786
Brown County 6,591 6,564 6,530 6,601 6,681 6,777 6,847 6,831 6,935 6,963 6,950
Bureau County 34,699 34,759 34,849 34,914 34,756 34,786 34,958 34,995 35,163 35,473 35,503
Calhoun County 5,019 5,024 5,097 5,121 5,117 5,104 5,097 4,974 5,042 5,090 5,084
Carroll County 15,749 15,809 15,861 15,972 16,001 16,179 16,328 16,365 16,441 16,626 16,674
Cass County 13,559 13,576 13,609 13,529 13,602 13,593 13,642 13,531 13,670 13,680 13,695
Champaign County 195,671 193,562 192,975 190,599 187,870 186,361 185,280 183,102 181,346 179,931 179,669
Christian County 34,253 34,467 34,566 34,642 34,786 35,010 34,944 35,022 35,152 35,354 35,372
Clark County 16,657 16,788 16,831 16,786 16,827 16,803 16,819 16,904 16,873 16,993 17,008
Clay County 13,538 13,663 13,705 13,815 13,924 13,974 14,065 14,147 14,221 14,410 14,560
Clinton County 36,368 36,402 36,216 36,202 35,987 35,955 35,839 35,719 35,630 35,536 35,535
Coles County 52,065 52,111 52,270 52,238 52,038 52,381 52,337 52,013 52,309 53,078 53,196
Cook County 5,287,037 5,256,705 5,235,762 5,236,986 5,268,513 5,302,421 5,330,484 5,355,574 5,376,559 5,376,861 5,376,741
Crawford County 19,433 19,415 19,502 19,619 19,754 19,820 19,920 20,086 20,299 20,398 20,452
Cumberland County 10,716 10,803 10,795 10,856 10,841 10,895 10,912 11,051 11,149 11,256 11,253
De Witt County 16,034 16,272 16,327 16,419 16,400 16,421 16,494 16,546 16,726 16,790 16,798
DeKalb County 107,333 106,503 105,321 102,752 99,485 97,079 94,804 92,449 90,838 89,334 88,969
Douglas County 19,169 19,313 19,466 19,580 19,652 19,738 19,729 19,825 19,916 19,925 19,922
DuPage County 932,541 927,382 922,948 922,190 922,589 922,962 920,457 918,864 914,228 906,576 904,161
Edgar County 18,471 18,624 18,811 18,900 18,946 19,046 19,124 19,339 19,560 19,657 19,704
Edwards County 6,444 6,496 6,525 6,520 6,647 6,706 6,792 6,799 6,854 6,967 6,971
Effingham County 34,424 34,274 34,246 34,315 34,384 34,520 34,422 34,309 34,358 34,260 34,264
Fayette County 20,935 20,957 20,959 21,086 21,139 20,597 21,086 21,490 21,512 21,792 21,802
Ford County 13,911 13,943 14,056 13,957 13,975 14,049 14,034 14,087 14,143 14,209 14,241
Franklin County 39,312 39,288 39,217 39,309 39,381 39,149 38,958 38,842 38,784 39,016 39,018
Fulton County 36,652 36,714 36,831 36,984 37,121 37,372 37,516 37,488 37,847 38,240 38,250
Gallatin County 5,705 5,867 5,940 6,026 6,069 6,108 6,148 6,175 6,306 6,427 6,445
Greene County 13,567 13,613 13,680 13,862 14,102 14,163 14,339 14,588 14,592 14,746 14,761
Grundy County 48,421 48,005 47,094 45,602 43,443 40,862 39,414 38,624 38,195 37,678 37,535
Hamilton County 8,096 8,145 8,148 8,264 8,277 8,372 8,318 8,370 8,492 8,604 8,621
Hancock County 18,359 18,553 18,761 18,893 19,036 19,215 19,386 19,590 19,938 20,089 20,121
Hardin County 4,358 4,408 4,462 4,506 4,617 4,673 4,737 4,701 4,762 4,787 4,800
Henderson County 7,354 7,463 7,551 7,602 7,780 7,915 7,944 8,103 8,181 8,209 8,213
Henry County 49,314 49,417 49,521 49,526 49,838 49,925 50,263 50,166 50,561 51,049 51,020
Iroquois County 29,690 29,983 30,018 30,063 30,331 30,318 30,539 30,698 30,938 31,320 31,334
Jackson County 58,103 58,151 58,216 59,064 59,095 58,711 58,750 58,577 59,354 59,612 59,612
Jasper County 9,530 9,622 9,619 9,669 9,787 9,916 9,900 9,972 10,037 10,070 10,117
Jefferson County 39,944 40,069 40,096 40,109 40,097 40,034 40,028 40,028 40,008 40,053 40,045
Jersey County 22,549 22,597 22,379 22,354 22,181 22,127 21,938 21,898 21,708 21,655 21,668
Jo Daviess County 21,990 22,089 22,169 22,309 22,244 22,298 22,430 22,305 22,391 22,276 22,289
Johnson County 13,730 13,675 13,688 13,687 13,486 13,506 13,445 12,715 13,020 12,920 12,878
Kane County 511,892 504,057 495,416 485,142 475,350 466,937 453,855 440,157 423,822 407,511 404,119
Kankakee County 113,215 112,719 111,725 110,108 108,453 107,424 106,096 105,416 104,816 103,879 103,833
Kendall County 104,821 101,499 97,112 87,864 79,054 72,336 66,868 61,755 58,093 55,217 54,544
Knox County 51,648 51,778 51,932 52,300 52,729 53,290 53,939 54,650 55,166 55,754 55,836
Lake County 712,567 707,622 702,479 698,305 691,815 684,394 676,086 671,443 660,454 648,116 644,356
LaSalle County 112,498 112,732 112,498 112,075 111,660 111,407 110,468 111,504 111,976 111,516 111,509
Lawrence County 16,408 16,525 16,598 16,489 16,730 16,460 16,407 16,042 15,271 15,390 15,452
Lee County 34,919 35,075 35,150 34,963 34,863 35,072 35,096 35,477 35,913 36,053 36,062
Livingston County 37,777 37,834 37,983 37,997 38,236 38,462 38,572 39,111 39,634 39,651 39,678
Logan County 29,776 29,907 29,880 29,938 30,211 30,452 30,486 30,713 30,880 31,149 31,183
Macon County 108,204 108,326 108,722 109,025 109,582 109,987 110,656 111,980 113,307 114,476 114,706
Macoupin County 47,774 48,150 48,234 48,165 48,416 48,633 48,709 48,769 48,829 48,989 49,019
Madison County 268,457 267,839 267,105 266,119 264,911 264,032 263,023 261,346 260,460 259,120 258,941
Marion County 39,008 39,422 39,584 39,736 39,688 40,035 40,454 40,893 41,365 41,687 41,691
Marshall County 12,702 12,745 12,895 12,877 12,934 12,997 12,905 12,941 12,920 13,138 13,180
Mason County 14,785 14,965 15,048 15,129 15,450 15,660 15,711 15,851 15,966 16,009 16,038
Massac County 14,970 15,027 15,113 15,085 15,211 15,232 15,043 15,103 15,022 15,127 15,161
McDonough County 32,770 32,787 33,080 32,968 32,930 32,838 33,001 32,813 32,800 32,855 32,913
McHenry County 320,961 318,118 314,696 309,214 301,741 294,351 286,909 278,222 269,976 261,887 260,077
McLean County 167,699 165,571 163,983 161,802 159,374 158,395 157,257 155,630 152,622 150,897 150,433
Menard County 12,466 12,546 12,518 12,376 12,394 12,516 12,473 12,473 12,482 12,493 12,486
Mercer County 16,276 16,465 16,429 16,478 16,554 16,689 16,751 16,872 16,898 16,950 16,957
Monroe County 33,236 32,871 32,441 31,944 31,300 30,659 29,936 29,195 28,373 27,763 27,619
Montgomery County 29,500 29,704 29,789 29,959 29,958 30,144 30,176 30,440 30,454 30,625 30,652
Morgan County 34,897 35,147 35,360 35,435 35,662 35,978 35,958 36,064 36,293 36,617 36,616
Moultrie County 14,392 14,376 14,346 14,270 14,338 14,324 14,284 14,267 14,274 14,319 14,287
Ogle County 55,336 55,289 55,023 54,621 53,935 53,358 52,808 52,138 51,620 51,161 51,032
Peoria County 185,816 183,810 183,088 182,550 182,105 182,034 181,901 182,453 182,235 183,166 183,433
Perry County 22,424 22,466 22,582 22,667 22,569 22,606 22,618 22,719 23,019 23,061 23,094
Piatt County 16,550 16,493 16,456 16,500 16,495 16,347 16,287 16,162 16,324 16,371 16,365
Pike County 16,273 16,391 16,576 16,460 16,719 16,796 16,790 16,986 17,166 17,335 17,384
Pope County 3,991 4,041 4,108 4,110 4,107 4,229 4,612 4,292 4,331 4,418 4,413
Pulaski County 6,218 6,305 6,444 6,518 6,663 6,825 6,946 7,083 7,181 7,324 7,348
Putnam County 6,009 5,994 5,986 5,925 5,973 6,014 6,074 6,068 6,062 6,075 6,086
Randolph County 32,686 32,728 32,826 33,001 33,015 33,241 33,064 33,273 34,005 33,897 33,893
Richland County 15,523 15,456 15,609 15,678 15,841 15,934 16,049 16,155 16,072 16,242 16,149
Rock Island County 146,826 146,661 147,071 146,341 146,451 146,817 147,044 148,140 148,641 149,143 149,374
Saline County 25,738 25,826 26,008 25,996 25,961 26,128 26,112 26,269 26,370 26,631 26,733
Sangamon County 195,716 194,759 193,845 193,305 192,622 192,270 191,850 191,486 190,303 189,093 188,951
Schuyler County 6,730 6,861 6,943 6,987 7,065 7,024 6,974 6,998 7,031 7,189 7,189
Scott County 5,193 5,199 5,219 5,248 5,333 5,368 5,429 5,452 5,511 5,539 5,537
Shelby County 21,803 21,793 21,753 21,890 22,033 22,156 22,370 22,490 22,613 22,831 22,893
St. Clair County 263,617 262,131 261,238 260,503 258,849 258,406 257,753 257,123 255,922 256,208 256,082
Stark County 6,019 6,074 6,088 6,106 6,094 6,141 6,174 6,255 6,302 6,320 6,332
Stephenson County 46,537 46,598 46,723 46,957 47,290 47,822 47,996 48,034 48,443 48,882 48,979
Tazewell County 132,466 131,493 130,972 129,837 129,176 128,349 127,768 128,107 128,132 128,494 128,485
Union County 18,005 18,042 18,123 18,118 18,100 18,076 18,137 18,108 18,121 18,256 18,293
Vermilion County 80,067 80,453 80,910 81,502 81,696 82,136 82,364 82,909 83,447 83,796 83,919
Wabash County 11,997 12,100 12,181 12,306 12,412 12,458 12,541 12,633 12,758 12,903 12,937
Warren County 17,409 17,411 17,591 17,639 17,704 17,758 18,114 18,327 18,446 18,683 18,735
Washington County 14,560 14,668 14,725 14,852 14,820 15,002 15,110 15,084 15,236 15,163 15,148
Wayne County 16,294 16,495 16,594 16,504 16,640 16,673 16,791 16,914 17,026 17,124 17,151
White County 14,661 14,726 14,674 14,826 14,975 15,010 14,948 15,100 15,264 15,328 15,371
Whiteside County 58,961 59,050 58,972 59,135 59,175 59,433 59,546 60,092 60,557 60,631 60,653
Will County 685,251 679,069 670,013 656,075 631,397 608,245 580,392 555,566 531,215 508,038 502,266
Williamson County 65,169 64,605 64,248 63,543 63,493 63,064 62,315 62,089 61,736 61,265 61,296
Winnebago County 299,702 299,489 297,603 292,797 289,422 286,929 285,120 282,572 280,805 278,989 278,418
Woodford County 38,862 38,516 37,972 37,376 37,025 36,503 36,021 35,698 35,557 35,484 35,469

Source: Population Division, U.S. Census Bureau