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US Population Statistics By CountyIllinois
Population By County
2005 Estimate
 
Illinois
Counties
Estimated
Growth Rate
%
Estimated
Population
2005
 Actual  Census
2000

 

Illinois2.60%      12,763,371       12,439,738
    
Adams County-1.71%            67,040             68,204
Alexander County-6.89%              8,927               9,588
Bond County2.16%            18,027             17,646
Boone County19.96%            50,483             42,083
Brown County-1.74%              6,835               6,956
Bureau County-0.47%            35,330             35,498
Calhoun County1.39%              5,163               5,092
Carroll County-3.23%            16,086             16,623
Cass County1.56%            13,898             13,685
Champaign County2.84%          184,905           179,803
Christian County-0.53%            35,176             35,362
Clark County-0.12%            16,976             16,996
Clay County-2.95%            14,122             14,552
Clinton County1.51%            36,095             35,559
Coles County-3.73%            51,065             53,042
Cook County-1.37%        5,303,683         5,377,536
Crawford County-2.48%            19,898             20,405
Cumberland County-2.58%            10,973             11,264
DeKalb County9.38%            97,665             89,292
De Witt County-1.04%            16,617             16,792
Douglas County0.15%            19,950             19,921
DuPage County2.47%          929,113           906,743
Edgar County-2.55%            19,157             19,659
Edwards County-2.61%              6,784               6,966
Effingham County0.91%            34,581             34,268
Fayette County-0.40%            21,713             21,801
Ford County-0.45%            14,157             14,221
Franklin County1.76%            39,723             39,036
Fulton County-1.38%            37,708             38,237
Gallatin County-4.40%              6,152               6,435
Greene County-1.16%            14,581             14,752
Grundy County16.34%            43,838             37,682
Hamilton County-3.48%              8,301               8,600
Hancock County-4.68%            19,153             20,094
Hardin County-1.52%              4,718               4,791
Henderson County-3.01%              7,972               8,219
Henry County-0.91%            50,591             51,055
Iroquois County-2.07%            30,677             31,324
Jackson County-2.65%            57,954             59,530
Jasper County-0.51%            10,020             10,071
Jefferson County0.90%            40,434             40,073
Jersey County3.64%            22,456             21,668
Jo Daviess County1.32%            22,580             22,286
Johnson County1.90%            13,169             12,923
Kane County18.25%          482,113           407,695
Kankakee County3.93%          107,972           103,890
Kendall County44.07%            79,514             55,190
Knox County-4.39%            53,309             55,756
Lake County8.30%          702,682           648,800
LaSalle County0.96%          112,604           111,529
Lawrence County3.39%            15,930             15,407
Lee County-1.08%            35,669             36,059
Livingston County-1.18%            39,186             39,653
Logan County-1.77%            30,603             31,156
McDonough County-2.72%            31,966             32,860
McHenry County16.16%          303,990           261,689
McLean County5.40%          159,013           150,862
Macon County-3.78%          110,167           114,492
Macoupin County0.20%            49,111             49,012
Madison County2.01%          264,309           259,109
Marion County-3.75%            40,144