| Annual Estimates of Housing Units for Counties in Illinois: April 1, 2000 to July 1, 2005 | ||||||||||
| Geographic Area | Housing unit estimates | April 1, 2000 | Number Change, 4/1/00-7/1/05 | % Change, 4/1/00-7/1/05 | ||||||
| July 1, 2005 | July 1, 2004 | July 1, 2003 | July 1, 2002 | July 1, 2001 | July 1, 2000 | Estimates base | Census | |||
| Illinois | 5,144,623 | 5,094,259 | 5,040,392 | 4,988,083 | 4,941,592 | 4,897,171 | 4,885,744 | 4,885,615 | 258,879 | 5.3% |
| .Adams County | 30,190 | 30,057 | 29,881 | 29,725 | 29,557 | 29,426 | 29,386 | 29,386 | 804 | 2.7% |
| .Alexander County | 4,630 | 4,620 | 4,623 | 4,628 | 4,614 | 4,597 | 4,591 | 4,591 | 39 | 0.8% |
| .Bond County | 7,035 | 6,973 | 6,909 | 6,865 | 6,817 | 6,715 | 6,689 | 6,690 | 346 | 5.2% |
| .Boone County | 17,759 | 17,207 | 16,646 | 16,305 | 15,846 | 15,501 | 15,414 | 15,414 | 2,345 | 15.2% |
| .Brown County | 2,533 | 2,517 | 2,507 | 2,499 | 2,487 | 2,463 | 2,456 | 2,456 | 77 | 3.1% |
| .Bureau County | 15,525 | 15,489 | 15,457 | 15,441 | 15,417 | 15,349 | 15,331 | 15,331 | 194 | 1.3% |
| .Calhoun County | 2,798 | 2,770 | 2,742 | 2,719 | 2,695 | 2,684 | 2,681 | 2,681 | 117 | 4.4% |
| .Carroll County | 8,193 | 8,148 | 8,105 | 8,063 | 8,009 | 7,958 | 7,945 | 7,945 | 248 | 3.1% |
| .Cass County | 5,888 | 5,805 | 5,796 | 5,795 | 5,793 | 5,786 | 5,784 | 5,784 | 104 | 1.8% |
| .Champaign County | 80,549 | 79,634 | 78,525 | 77,202 | 76,461 | 75,518 | 75,280 | 75,280 | 5,269 | 7.0% |
| .Christian County | 15,341 | 15,299 | 15,220 | 15,141 | 15,080 | 15,010 | 14,992 | 14,992 | 349 | 2.3% |
| .Clark County | 8,061 | 8,028 | 7,977 | 7,932 | 7,885 | 7,833 | 7,816 | 7,816 | 245 | 3.1% |
| .Clay County | 6,568 | 6,545 | 6,510 | 6,480 | 6,446 | 6,407 | 6,394 | 6,394 | 174 | 2.7% |
| .Clinton County | 14,666 | 14,481 | 14,283 | 14,111 | 13,983 | 13,850 | 13,802 | 13,805 | 864 | 6.3% |
| .Coles County | 23,312 | 23,151 | 23,067 | 23,020 | 22,905 | 22,798 | 22,768 | 22,768 | 544 | 2.4% |
| .Cook County | 2,143,737 | 2,134,463 | 2,124,010 | 2,113,000 | 2,104,905 | 2,097,910 | 2,096,154 | 2,096,121 | 47,583 | 2.3% |
| .Crawford County | 8,980 | 8,953 | 8,907 | 8,868 | 8,832 | 8,797 | 8,785 | 8,785 | 195 | 2.2% |
| .Cumberland County | 5,059 | 5,030 | 4,993 | 4,954 | 4,921 | 4,887 | 4,876 | 4,876 | 183 | 3.8% |
| .De Witt County | 7,480 | 7,451 | 7,416 | 7,372 | 7,332 | 7,292 | 7,282 | 7,282 | 198 | 2.7% |
| .DeKalb County | 36,428 | 35,659 | 34,843 | 34,256 | 33,630 | 33,117 | 32,988 | 32,988 | 3,440 | 10.4% |
| .Douglas County | 8,256 | 8,220 | 8,158 | 8,088 | 8,051 | 8,015 | 8,005 | 8,005 | 251 | 3.1% |
| .DuPage County | 353,126 | 350,385 | 347,708 | 344,346 | 340,261 | 336,548 | 335,619 | 335,621 | 17,507 | 5.2% |
| .Edgar County | 8,825 | 8,805 | 8,770 | 8,744 | 8,712 | 8,633 | 8,611 | 8,611 | 214 | 2.5% |
| .Edwards County | 3,308 | 3,294 | 3,271 | 3,248 | 3,228 | 3,206 | 3,199 | 3,199 | 109 | 3.4% |
| .Effingham County | 14,474 | 14,378 | 14,268 | 14,172 | 14,084 | |||||