(Links below lead to Quick Facts for Indiana Counties: People, Business & Geography at U.S. Census Bureau.)
| Area | 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 |
| Indiana | 6,376,792 | 6,335,862 | 6,294,124 | 6,248,569 | 6,210,801 | 6,178,828 | 6,146,974 | 6,123,942 | 6,091,392 | 6,080,485 |
|---|---|---|---|---|---|---|---|---|---|---|
| Adams County | 33,985 | 33,762 | 33,732 | 33,754 | 33,734 | 33,675 | 33,497 | 33,554 | 33,612 | 33,625 |
| Allen County | 350,523 | 348,761 | 345,529 | 342,387 | 340,291 | 338,973 | 336,856 | 334,823 | 332,695 | 331,849 |
| Bartholomew County | 75,360 | 74,578 | 73,889 | 73,069 | 72,420 | 71,926 | 71,653 | 71,973 | 71,723 | 71,435 |
| Benton County | 8,769 | 8,774 | 8,831 | 8,841 | 8,957 | 9,102 | 9,132 | 9,290 | 9,396 | 9,421 |
| Blackford County | 13,093 | 13,187 | 13,267 | 13,518 | 13,603 | 13,725 | 13,761 | 13,775 | 14,006 | 14,048 |
| Boone County | 55,027 | 53,979 | 52,902 | 51,399 | 50,281 | 49,139 | 48,154 | 47,086 | 46,379 | 46,107 |
| Brown County | 14,550 | 14,641 | 14,813 | 14,898 | 15,079 | 15,135 | 15,181 | 15,114 | 14,986 | 14,957 |
| Carroll County | 19,864 | 19,921 | 19,977 | 20,054 | 19,979 | 20,301 | 20,193 | 20,261 | 20,147 | 20,165 |
| Cass County | 39,123 | 39,040 | 39,296 | 39,643 | 39,927 | 40,151 | 40,360 | 40,907 | 40,959 | 40,930 |
| Clark County | 106,673 | 105,050 | 103,629 | 101,406 | 100,163 | 99,114 | 97,828 | 97,174 | 96,748 | 96,472 |
| Clay County | 26,703 | 26,632 | 26,747 | 26,833 | 26,809 | 26,633 | 26,398 | 26,559 | 26,565 | 26,556 |
| Clinton County | 34,069 | 33,762 | 33,820 | 33,692 | 33,720 | 33,677 | 33,836 | 33,934 | 33,961 | 33,866 |
| Crawford County | 10,624 | 10,785 | 10,899 | 10,951 | 10,981 | 10,969 | 10,951 | 10,911 | 10,785 | 10,743 |
| Daviess County | 30,147 | 29,974 | 29,825 | 29,972 | 29,911 | 29,798 | 29,646 | 29,627 | 29,829 | 29,820 |
| Dearborn County | 49,985 | 49,579 | 49,095 | 48,618 | 48,299 | 47,747 | 47,146 | 46,774 | 46,345 | 46,109 |
| Decatur County | 24,998 | 24,937 | 24,967 | 25,031 | 24,932 | 24,733 | 24,648 | 24,510 | 24,567 | 24,555 |
| DeKalb County | 41,884 | 41,733 | 41,467 | 41,393 | 41,175 | 40,918 | 40,621 | 40,451 | 40,402 | 40,285 |
| Delaware County | 114,685 | 115,167 | 115,498 | 116,600 | 117,698 | 118,952 | 119,355 | 119,987 | 118,734 | 118,769 |
| Dubois County | 41,449 | 41,164 | 40,965 | 40,710 | 40,483 | 40,143 | 39,937 | 39,894 | 39,693 | 39,674 |
| Elkhart County | 199,137 | 197,639 | 196,341 | 193,428 | 189,948 | 187,655 | 185,013 | 185,033 | 183,522 | 182,791 |
| Fayette County | 24,265 | 24,250 | 24,363 | 24,590 | 24,756 | 24,885 | 25,061 | 25,251 | 25,556 | 25,588 |
| Floyd County | 73,780 | 72,943 | 72,316 | 71,789 | 71,381 | 71,157 | 71,400 | 71,440 | 70,907 | 70,823 |
| Fountain County | 17,041 | 17,109 | 17,220 | 17,213 | 17,400 | 17,600 | 17,736 | 17,703 | 17,917 | 17,954 |
| Franklin County | 23,343 | 23,183 | 23,018 | 22,931 | 22,756 | 22,618 | 22,423 | 22,275 | 22,221 | 22,151 |
| Fulton County | 20,319 | 20,254 | 20,244 | 20,253 | 20,244 | 20,215 | 20,370 | 20,465 | 20,553 | 20,511 |
| Gibson County | 32,666 | 32,709 | 32,943 | 32,918 | 32,932 | 32,739 | 32,584 | 32,622 | 32,531 | 32,500 |
| Grant County | 68,609 | 68,787 | 69,441 | 69,970 | 70,814 | 71,600 | 72,099 | 72,739 | 73,290 | 73,403 |
| Greene County | 32,577 | 32,642 | 32,895 | 33,042 | 33,172 | 33,130 | 32,968 | 33,161 | 33,199 | 33,157 |
| Hamilton County | 269,785 | 260,804 | 251,611 | 241,796 | 231,568 | 219,631 | 207,733 | 196,259 | 185,287 | 182,740 |
| Hancock County | 67,282 | 66,107 | 64,485 | 62,413 | 60,427 | 59,220 | 57,978 | 56,594 | 55,662 | 55,391 |
| Harrison County | 37,067 | 36,775 | 36,614 | 36,444 | 36,011 | 35,384 | 35,043 | 34,664 | 34,515 | 34,325 |
| Hendricks County | 137,240 | 134,230 | 129,806 | 126,243 | 122,746 | 118,332 | 114,627 | 109,885 | 105,365 | 104,093 |
| Henry County | 47,162 | 46,991 | 47,430 | 47,283 | 47,562 | 47,674 | 47,962 | 48,236 | 48,447 | 48,508 |
| Howard County | 83,381 | 83,648 | 83,795 | 84,311 | 84,253 | 84,503 | 84,587 | 84,955 | 84,971 | 84,964 |
| Huntington County | 37,570 | 37,729 | 37,859 | 37,979 | 38,048 | 38,070 | 38,149 | 37,973 | 38,099 | 38,075 |
| Jackson County | 42,193 | 42,024 | 41,915 | 41,844 | 41,556 | 41,492 | 41,406 | 41,372 | 41,403 | 41,335 |
| Jasper County | 32,544 | 32,222 | 31,811 | 31,270 | 31,088 | 30,783 | 30,389 | 30,207 | 30,182 | 30,043 |
| Jay County | 21,412 | 21,474 | 21,419 | 21,380 | 21,479 | 21,549 | 21,635 | 21,692 | 21,793 | 21,806 |
| Jefferson County | 32,820 | 32,591 | 32,552 | 32,275 | 32,045 | 31,897 | 31,963 | 31,936 | 31,728 | 31,705 |
| Jennings County | 28,040 | 28,077 | 27,931 | 28,060 | 27,982 | 27,844 | 28,028 | 27,873 | 27,692 | 27,554 |
| Johnson County | 139,158 | 136,032 | 132,575 | 129,249 | 126,360 | 123,968 | 121,854 | 118,733 | 115,938 | 115,209 |
| Knox County | 38,057 | 37,982 | 38,038 | 38,159 | 38,403 | 38,414 | 38,764 | 38,841 | 39,194 | 39,256 |
| Kosciusko County | 76,275 | 76,073 | 75,730 | 75,390 | 75,032 | 74,865 | 74,701 | 74,725 | 74,212 | 74,057 |
| LaGrange County | 37,172 | 36,926 | 36,661 | 36,307 | 36,055 | 35,754 | 35,523 | 35,367 | 34,947 | 34,909 |
| Lake County | 493,800 | 491,238 | 489,269 | 487,692 | 485,972 | 484,405 | 483,936 | 484,179 | 484,489 | 484,564 |
| LaPorte County | 110,888 | 110,274 | 109,167 | 109,145 | 108,581 | 108,743 | 109,424 | 110,049 | 110,158 | 110,106 |
| Lawrence County | 45,913 | 45,985 | 45,866 | 45,962 | 45,892 | 46,019 | 45,959 | 45,936 | 45,925 | 45,922 |
| Madison County | 131,501 | 131,157 | 131,012 | 130,603 | 131,198 | 131,627 | 132,458 | 132,992 | 133,278 | 133,358 |
| Marion County | 880,380 | 876,144 | 872,069 | 867,476 | 865,929 | 865,171 | 864,352 | 864,855 | 860,908 | 860,454 |
| Marshall County | 46,709 | 46,546 | 46,573 | 46,317 | 46,108 | 45,786 | 45,444 | 45,500 | 45,244 | 45,128 |
| Martin County | 9,969 | 10,036 | 10,135 | 10,149 | 10,223 | 10,205 | 10,278 | 10,279 | 10,359 | 10,369 |
| Miami County | 36,219 | 36,642 | 36,932 | 36,780 | 36,573 | 36,839 | 36,764 | 36,338 | 36,160 | 36,082 |
| Monroe County | 128,992 | 127,625 | 126,348 | 124,545 | 123,554 | 122,395 | 121,237 | 120,934 | 120,750 | 120,563 |
| Montgomery County | 37,805 | 37,751 | 37,625 | 37,783 | 37,551 | 37,467 | 37,727 | 37,764 | 37,600 | 37,629 |
| Morgan County | 70,668 | 69,755 | 69,526 | 69,174 | 68,740 | 68,421 | 67,778 | 67,171 | 66,886 | 66,689 |
| Newton County | 13,933 | 14,004 | 13,988 | 14,196 | 14,161 | 14,278 | 14,245 | 14,319 | 14,542 | 14,566 |
| Noble County | 47,601 | 47,451 | 47,408 | 47,211 | 46,914 | 46,787 | 46,770 | 46,965 | 46,458 | 46,275 |
| Ohio County | 5,773 | 5,757 | 5,823 | 5,846 | 5,806 | 5,750 | 5,739 | 5,666 | 5,636 | 5,623 |
| Orange County | 19,571 | 19,581 | 19,470 | 19,561 | 19,480 | 19,510 | 19,375 | 19,344 | 19,320 | 19,306 |
| Owen County | 22,375 | 22,353 | 22,300 | 22,367 | 22,517 | 22,573 | 22,267 | 22,066 | 21,872 | 21,786 |
| Parke County | 17,152 | 17,156 | 17,137 | 17,210 | 17,382 | 17,508 | 17,275 | 17,236 | 17,217 | 17,241 |
| Perry County | 18,929 | 18,947 | 18,804 | 18,929 | 18,894 | 18,769 | 18,796 | 18,845 | 18,880 | 18,899 |
| Pike County | 12,569 | 12,589 | 12,619 | 12,538 | 12,770 | 12,758 | 12,843 | 12,832 | 12,816 | 12,837 |
| Porter County | 162,181 | 160,267 | 158,059 | 155,690 | 153,419 | 151,521 | 149,927 | 148,362 | 147,155 | 146,798 |
| Posey County | 26,079 | 26,208 | 26,340 | 26,496 | 26,673 | 26,735 | 26,918 | 26,938 | 27,064 | 27,061 |
| Pulaski County | 13,712 | 13,759 | 13,766 | 13,779 | 13,774 | 13,748 | 13,733 | 13,758 | 13,739 | 13,755 |
| Putnam County | 37,183 | 37,139 | 36,852 | 36,996 | 36,880 | 36,648 | 36,193 | 36,177 | 36,113 | 36,019 |
| Randolph County | 25,801 | 25,794 | 26,071 | 26,219 | 26,348 | 26,583 | 26,887 | 27,124 | 27,375 | 27,401 |
| Ripley County | 27,400 | 27,308 | 27,387 | 27,286 | 27,254 | 27,167 | 27,134 | 26,987 | 26,645 | 26,523 |
| Rush County | 17,297 | 17,512 | 17,552 | 17,661 | 17,737 | 17,991 | 17,980 | 18,125 | 18,206 | 18,261 |
| Scott County | 23,627 | 23,694 | 23,631 | 23,603 | 23,400 | 23,459 | 23,259 | 23,270 | 23,034 | 22,960 |
| Shelby County | 44,186 | 43,906 | 43,609 | 43,428 | 43,469 | 43,403 | 43,639 | 43,826 | 43,555 | 43,445 |
| Spencer County | 20,111 | 20,281 | 20,279 | 20,277 | 20,118 | 20,163 | 20,191 | 20,343 | 20,414 | 20,391 |
| St. Joseph County | 266,680 | 265,757 | 265,212 | 264,532 | 264,315 | 264,531 | 265,042 | 265,477 | 265,834 | 265,559 |
| Starke County | 23,658 | 23,493 | 23,470 | 23,398 | 23,318 | 23,344 | 23,380 | 23,227 | 23,524 | 23,556 |
| Steuben County | 33,368 | 33,366 | 33,502 | 33,529 | 33,401 | 33,542 | 33,342 | 33,472 | 33,314 | 33,214 |
| Sullivan County | 21,328 | 21,340 | 21,359 | 21,523 | 21,662 | 21,683 | 21,717 | 21,725 | 21,742 | 21,751 |
| Switzerland County | 9,696 | 9,667 | 9,610 | 9,670 | 9,469 | 9,416 | 9,502 | 9,349 | 9,094 | 9,065 |
| Tippecanoe County | 164,237 | 162,064 | 159,480 | 155,955 | 153,607 | 152,352 | 151,336 | 150,599 | 149,292 | 148,955 |
| Tipton County | 15,923 | 16,027 | 16,118 | 16,239 | 16,367 | 16,391 | 16,449 | 16,458 | 16,558 | 16,577 |
| Union County | 7,157 | 7,177 | 7,160 | 7,122 | 7,088 | 7,138 | 7,263 | 7,269 | 7,340 | 7,349 |
| Vanderburgh County | 174,729 | 174,769 | 174,274 | 173,623 | 173,438 | 172,839 | 172,173 | 171,978 | 171,958 | 171,922 |
| Vermillion County | 16,234 | 16,378 | 16,436 | 16,447 | 16,395 | 16,400 | 16,499 | 16,611 | 16,770 | 16,788 |
| Vigo County | 105,968 | 105,761 | 105,390 | 104,309 | 103,890 | 104,741 | 104,804 | 105,302 | 105,736 | 105,848 |
| Wabash County | 32,706 | 32,872 | 33,234 | 33,486 | 33,870 | 34,114 | 34,358 | 34,627 | 34,977 | 34,960 |
| Warren County | 8,547 | 8,492 | 8,581 | 8,623 | 8,609 | 8,589 | 8,607 | 8,559 | 8,442 | 8,419 |
| Warrick County | 57,656 | 56,996 | 56,071 | 55,604 | 54,811 | 54,157 | 53,148 | 52,694 | 52,518 | 52,383 |
| Washington County | 27,949 | 27,879 | 27,808 | 27,610 | 27,632 | 27,575 | 27,582 | 27,446 | 27,262 | 27,223 |
| Wayne County | 67,795 | 68,136 | 68,515 | 68,819 | 69,293 | 69,893 | 70,154 | 70,521 | 71,017 | 71,097 |
| Wells County | 27,964 | 27,899 | 27,851 | 27,762 | 27,778 | 27,760 | 27,722 | 27,604 | 27,601 | 27,600 |
| White County | 23,800 | 23,786 | 23,970 | 24,105 | 24,372 | 24,603 | 24,951 | 25,197 | 25,225 | 25,267 |
| Whitley County | 32,667 | 32,517 | 32,305 | 31,988 | 31,709 | 31,541 | 31,268 | 31,042 | 30,727 | 30,707 |
Source: Population Division, U.S. Census Bureau