Illinois Counties | Estimated Growth Rate % | Estimated Population 2005 | Actual Census 2000 | | | Illinois | 2.60% | 12,763,371 | 12,439,738 | | | | | | | Adams County | -1.71% | 67,040 | 68,204 | | Alexander County | -6.89% | 8,927 | 9,588 | | Bond County | 2.16% | 18,027 | 17,646 | | Boone County | 19.96% | 50,483 | 42,083 | | Brown County | -1.74% | 6,835 | 6,956 | | Bureau County | -0.47% | 35,330 | 35,498 | | Calhoun County | 1.39% | 5,163 | 5,092 | | Carroll County | -3.23% | 16,086 | 16,623 | | Cass County | 1.56% | 13,898 | 13,685 | | Champaign County | 2.84% | 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 County | 1.51% | 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 County | 9.38% | 97,665 | 89,292 | | De Witt County | -1.04% | 16,617 | 16,792 | | Douglas County | 0.15% | 19,950 | 19,921 | | DuPage County | 2.47% | 929,113 | 906,743 | | Edgar County | -2.55% | 19,157 | 19,659 | | Edwards County | -2.61% | 6,784 | 6,966 | | Effingham County | 0.91% | 34,581 | 34,268 | | Fayette County | -0.40% | 21,713 | 21,801 | | Ford County | -0.45% | 14,157 | 14,221 | | Franklin County | 1.76% | 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 County | 16.34% | 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 County | 0.90% | 40,434 | 40,073 | | Jersey County | 3.64% | 22,456 | 21,668 | | Jo Daviess County | 1.32% | 22,580 | 22,286 | | Johnson County | 1.90% | 13,169 | 12,923 | | Kane County | 18.25% | 482,113 | 407,695 | | Kankakee County | 3.93% | 107,972 | 103,890 | | Kendall County | 44.07% | 79,514 | 55,190 | | Knox County | -4.39% | 53,309 | 55,756 | | Lake County | 8.30% | 702,682 | 648,800 | | LaSalle County | 0.96% | 112,604 | 111,529 | | Lawrence County | 3.39% | 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 County | 16.16% | 303,990 | 261,689 | | McLean County | 5.40% | 159,013 | 150,862 | | Macon County | -3.78% | 110,167 | 114,492 | | Macoupin County | 0.20% | 49,111 | 49,012 | | Madison County | 2.01% | 264,309 | 259,109 | | Marion County | -3.75% | 40,144 | |
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