(Links below lead to Quick Facts for Kansas 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 |
| Kansas | 2,818,747 | 2,797,375 | 2,775,586 | 2,755,700 | 2,741,771 | 2,730,765 | 2,721,955 | 2,712,598 | 2,701,456 | 2,692,810 | 2,688,418 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Allen County | 13,203 | 13,268 | 13,407 | 13,513 | 13,625 | 13,834 | 13,872 | 14,067 | 14,147 | 14,386 | 14,385 |
| Anderson County | 7,872 | 7,958 | 7,858 | 7,861 | 7,949 | 7,992 | 8,107 | 8,090 | 8,168 | 8,090 | 8,110 |
| Atchison County | 16,411 | 16,374 | 16,447 | 16,548 | 16,567 | 16,700 | 16,688 | 16,699 | 16,792 | 16,765 | 16,774 |
| Barber County | 4,593 | 4,612 | 4,716 | 4,820 | 4,829 | 4,879 | 4,952 | 5,023 | 5,123 | 5,287 | 5,307 |
| Barton County | 27,464 | 27,505 | 27,694 | 27,727 | 27,880 | 27,738 | 27,777 | 27,861 | 27,904 | 28,129 | 28,205 |
| Bourbon County | 14,884 | 14,880 | 14,821 | 14,800 | 14,845 | 14,990 | 15,100 | 15,153 | 15,354 | 15,382 | 15,379 |
| Brown County | 9,927 | 9,988 | 10,022 | 10,112 | 10,093 | 10,265 | 10,282 | 10,389 | 10,567 | 10,711 | 10,724 |
| Butler County | 64,084 | 63,452 | 62,887 | 62,390 | 61,575 | 61,089 | 60,494 | 60,119 | 59,723 | 59,675 | 59,482 |
| Chase County | 2,798 | 2,821 | 2,849 | 2,960 | 2,974 | 3,006 | 2,952 | 3,020 | 2,977 | 3,029 | 3,030 |
| Chautauqua County | 3,745 | 3,756 | 3,775 | 3,850 | 4,003 | 4,153 | 4,153 | 4,192 | 4,247 | 4,347 | 4,359 |
| Cherokee County | 21,064 | 21,178 | 21,410 | 21,435 | 21,389 | 21,831 | 21,913 | 22,043 | 22,266 | 22,549 | 22,605 |
| Cheyenne County | 2,700 | 2,728 | 2,757 | 2,820 | 2,840 | 2,892 | 2,931 | 3,016 | 3,074 | 3,156 | 3,165 |
| Clark County | 2,081 | 2,079 | 2,071 | 2,128 | 2,190 | 2,267 | 2,290 | 2,320 | 2,359 | 2,387 | 2,390 |
| Clay County | 8,704 | 8,796 | 8,682 | 8,581 | 8,547 | 8,528 | 8,557 | 8,645 | 8,741 | 8,812 | 8,822 |
| Cloud County | 9,263 | 9,302 | 9,313 | 9,376 | 9,580 | 9,613 | 9,787 | 9,883 | 10,053 | 10,226 | 10,268 |
| Coffey County | 8,436 | 8,442 | 8,422 | 8,539 | 8,522 | 8,609 | 8,720 | 8,727 | 8,779 | 8,893 | 8,865 |
| Comanche County | 1,873 | 1,898 | 1,836 | 1,834 | 1,923 | 1,900 | 1,904 | 1,955 | 1,983 | 1,956 | 1,967 |
| Cowley County | 33,634 | 33,988 | 34,139 | 34,055 | 34,459 | 35,121 | 35,384 | 36,051 | 35,752 | 36,252 | 36,291 |
| Crawford County | 38,869 | 38,871 | 38,744 | 38,684 | 38,493 | 38,539 | 38,537 | 38,276 | 38,396 | 38,233 | 38,242 |
| Decatur County | 2,855 | 2,912 | 2,964 | 3,032 | 3,065 | 3,186 | 3,260 | 3,351 | 3,433 | 3,458 | 3,472 |
| Dickinson County | 19,015 | 19,203 | 18,871 | 18,922 | 18,871 | 18,864 | 19,007 | 18,965 | 19,057 | 19,345 | 19,344 |
| Doniphan County | 7,624 | 7,770 | 7,786 | 7,757 | 7,721 | 7,892 | 8,052 | 8,124 | 8,186 | 8,235 | 8,249 |
| Douglas County | 116,383 | 114,752 | 113,409 | 112,559 | 111,519 | 108,385 | 106,231 | 104,408 | 102,292 | 100,295 | 99,962 |
| Edwards County | 3,071 | 3,097 | 3,105 | 3,105 | 3,211 | 3,244 | 3,231 | 3,313 | 3,373 | 3,425 | 3,449 |
| Elk County | 3,001 | 3,010 | 2,984 | 3,011 | 3,074 | 3,101 | 3,108 | 3,164 | 3,157 | 3,219 | 3,261 |
| Ellis County | 27,739 | 27,477 | 27,238 | 27,228 | 27,080 | 27,184 | 27,302 | 27,407 | 27,531 | 27,455 | 27,507 |
| Ellsworth County | 6,179 | 6,234 | 6,288 | 6,281 | 6,252 | 6,316 | 6,350 | 6,357 | 6,443 | 6,525 | 6,525 |
| Finney County | 42,074 | 40,925 | 40,782 | 40,713 | 40,518 | 40,547 | 40,043 | 40,155 | 40,674 | 40,602 | 40,523 |
| Ford County | 33,692 | 32,710 | 32,649 | 32,443 | 32,706 | 32,555 | 32,505 | 32,150 | 32,284 | 32,574 | 32,458 |
| Franklin County | 26,441 | 26,397 | 26,263 | 26,208 | 25,991 | 25,961 | 25,706 | 25,495 | 25,146 | 24,851 | 24,784 |
| Geary County | 31,751 | 31,157 | 29,539 | 28,994 | 28,312 | 28,170 | 28,643 | 28,174 | 27,999 | 27,677 | 27,947 |
| Gove County | 2,480 | 2,490 | 2,605 | 2,690 | 2,723 | 2,800 | 2,868 | 2,958 | 3,003 | 3,067 | 3,068 |
| Graham County | 2,435 | 2,527 | 2,576 | 2,632 | 2,661 | 2,705 | 2,776 | 2,842 | 2,871 | 2,921 | 2,946 |
| Grant County | 7,353 | 7,338 | 7,442 | 7,446 | 7,468 | 7,545 | 7,634 | 7,809 | 7,744 | 7,878 | 7,909 |
| Gray County | 6,005 | 5,879 | 5,767 | 5,869 | 5,905 | 5,969 | 5,991 | 5,978 | 5,921 | 5,904 | 5,904 |
| Greeley County | 1,234 | 1,275 | 1,299 | 1,283 | 1,317 | 1,383 | 1,392 | 1,437 | 1,537 | 1,540 | 1,534 |
| Greenwood County | 6,666 | 6,807 | 6,939 | 6,934 | 7,212 | 7,409 | 7,489 | 7,570 | 7,660 | 7,656 | 7,673 |
| Hamilton County | 2,625 | 2,591 | 2,591 | 2,548 | 2,561 | 2,619 | 2,678 | 2,667 | 2,673 | 2,658 | 2,670 |
| Harper County | 5,667 | 5,772 | 5,741 | 5,822 | 5,970 | 6,101 | 6,184 | 6,224 | 6,389 | 6,502 | 6,536 |
| Harvey County | 34,247 | 33,768 | 33,623 | 33,462 | 33,397 | 33,411 | 33,314 | 33,190 | 32,923 | 32,877 | 32,869 |
| Haskell County | 4,006 | 3,981 | 4,036 | 4,053 | 4,139 | 4,151 | 4,151 | 4,153 | 4,229 | 4,307 | 4,307 |
| Hodgeman County | 1,906 | 1,928 | 1,935 | 2,007 | 2,023 | 2,079 | 2,117 | 2,140 | 2,125 | 2,084 | 2,085 |
| Jackson County | 13,412 | 13,245 | 13,356 | 13,352 | 13,363 | 13,076 | 12,992 | 12,840 | 12,685 | 12,664 | 12,657 |
| Jefferson County | 18,207 | 18,311 | 18,365 | 18,391 | 18,625 | 18,602 | 18,486 | 18,480 | 18,458 | 18,442 | 18,426 |
| Jewell County | 3,059 | 3,123 | 3,187 | 3,248 | 3,260 | 3,345 | 3,420 | 3,496 | 3,612 | 3,759 | 3,791 |
| Johnson County | 542,737 | 535,000 | 525,938 | 516,285 | 505,578 | 496,358 | 486,338 | 475,918 | 463,974 | 454,644 | 451,086 |
| Kearny County | 4,169 | 4,140 | 4,138 | 4,233 | 4,303 | 4,361 | 4,349 | 4,447 | 4,536 | 4,512 | 4,531 |
| Kingman County | 7,571 | 7,637 | 7,772 | 7,901 | 8,063 | 8,285 | 8,427 | 8,392 | 8,553 | 8,677 | 8,673 |
| Kiowa County | 2,322 | 2,297 | 2,708 | 2,918 | 2,984 | 3,047 | 3,107 | 3,101 | 3,133 | 3,254 | 3,278 |
| Labette County | 21,776 | 21,807 | 21,954 | 21,940 | 21,930 | 21,938 | 22,127 | 22,248 | 22,458 | 22,737 | 22,835 |
| Lane County | 1,742 | 1,730 | 1,738 | 1,758 | 1,828 | 1,899 | 1,943 | 1,972 | 2,099 | 2,145 | 2,155 |
| Leavenworth County | 75,227 | 74,355 | 73,603 | 72,574 | 71,762 | 71,409 | 71,205 | 70,756 | 69,796 | 68,921 | 68,691 |
| Lincoln County | 3,123 | 3,221 | 3,266 | 3,272 | 3,365 | 3,355 | 3,489 | 3,482 | 3,542 | 3,574 | 3,578 |
| Linn County | 9,335 | 9,439 | 9,593 | 9,772 | 9,833 | 9,680 | 9,669 | 9,664 | 9,712 | 9,599 | 9,570 |
| Logan County | 2,549 | 2,601 | 2,632 | 2,666 | 2,757 | 2,804 | 2,845 | 2,927 | 2,959 | 3,048 | 3,046 |
| Lyon County | 33,601 | 35,318 | 35,720 | 35,575 | 35,715 | 35,861 | 35,735 | 35,749 | 36,009 | 35,965 | 35,935 |
| Marion County | 11,982 | 12,056 | 12,187 | 12,347 | 12,623 | 12,754 | 13,000 | 13,129 | 13,293 | 13,377 | 13,361 |
| Marshall County | 10,123 | 10,180 | 10,158 | 10,166 | 10,265 | 10,309 | 10,449 | 10,590 | 10,794 | 10,934 | 10,965 |
| McPherson County | 28,866 | 28,814 | 29,027 | 28,986 | 29,228 | 29,174 | 29,171 | 29,211 | 29,481 | 29,571 | 29,554 |
| Meade County | 4,407 | 4,407 | 4,408 | 4,452 | 4,518 | 4,516 | 4,554 | 4,637 | 4,655 | 4,622 | 4,631 |
| Miami County | 30,969 | 30,787 | 30,761 | 30,145 | 29,895 | 29,476 | 28,926 | 28,735 | 28,589 | 28,507 | 28,351 |
| Mitchell County | 6,344 | 6,293 | 6,310 | 6,314 | 6,384 | 6,493 | 6,650 | 6,685 | 6,762 | 6,911 | 6,932 |
| Montgomery County | 34,254 | 34,277 | 34,402 | 34,265 | 34,212 | 34,493 | 34,648 | 35,154 | 35,750 | 36,205 | 36,252 |
| Morris County | 5,994 | 6,017 | 5,943 | 5,930 | 5,948 | 5,906 | 5,923 | 5,982 | 6,059 | 6,113 | 6,104 |
| Morton County | 3,031 | 3,051 | 3,087 | 3,138 | 3,176 | 3,227 | 3,325 | 3,336 | 3,366 | 3,480 | 3,496 |
| Nemaha County | 9,968 | 10,060 | 10,148 | 10,183 | 10,233 | 10,292 | 10,408 | 10,449 | 10,465 | 10,684 | 10,717 |
| Neosho County | 16,046 | 16,139 | 16,168 | 16,120 | 16,289 | 16,425 | 16,437 | 16,609 | 16,836 | 16,944 | 16,997 |
| Ness County | 2,835 | 2,909 | 2,961 | 2,988 | 3,052 | 3,116 | 3,193 | 3,299 | 3,361 | 3,440 | 3,454 |
| Norton County | 5,330 | 5,418 | 5,441 | 5,519 | 5,570 | 5,631 | 5,727 | 5,760 | 5,814 | 5,948 | 5,953 |
| Osage County | 16,104 | 16,266 | 16,315 | 16,494 | 16,753 | 16,754 | 16,659 | 16,650 | 16,639 | 16,758 | 16,712 |
| Osborne County | 3,849 | 3,804 | 3,852 | 3,937 | 3,982 | 4,051 | 4,114 | 4,261 | 4,333 | 4,435 | 4,452 |
| Ottawa County | 5,974 | 5,993 | 5,970 | 5,990 | 5,998 | 6,034 | 6,091 | 6,148 | 6,120 | 6,189 | 6,163 |
| Pawnee County | 6,206 | 6,256 | 6,401 | 6,447 | 6,661 | 6,699 | 6,764 | 6,874 | 7,009 | 7,218 | 7,233 |
| Phillips County | 5,272 | 5,282 | 5,315 | 5,335 | 5,439 | 5,584 | 5,626 | 5,751 | 5,860 | 5,994 | 6,001 |
| Pottawatomie County | 19,994 | 19,779 | 19,471 | 18,925 | 18,787 | 18,676 | 18,539 | 18,324 | 18,273 | 18,277 | 18,209 |
| Pratt County | 9,304 | 9,366 | 9,407 | 9,409 | 9,407 | 9,322 | 9,441 | 9,579 | 9,525 | 9,629 | 9,647 |
| Rawlins County | 2,425 | 2,466 | 2,536 | 2,557 | 2,601 | 2,690 | 2,765 | 2,846 | 2,875 | 2,959 | 2,966 |
| Reno County | 63,357 | 63,227 | 63,015 | 63,215 | 63,256 | 63,363 | 63,667 | 63,961 | 64,467 | 64,691 | 64,790 |
| Republic County | 4,808 | 4,832 | 4,914 | 4,974 | 5,083 | 5,159 | 5,296 | 5,421 | 5,650 | 5,801 | 5,835 |
| Rice County | 10,079 | 10,128 | 10,039 | 10,168 | 10,348 | 10,462 | 10,442 | 10,517 | 10,607 | 10,732 | 10,761 |
| Riley County | 71,341 | 71,113 | 69,406 | 69,164 | 67,507 | 66,144 | 65,474 | 63,755 | 63,371 | 63,085 | 62,843 |
| Rooks County | 4,984 | 5,088 | 5,134 | 5,198 | 5,252 | 5,326 | 5,378 | 5,452 | 5,547 | 5,663 | 5,685 |
| Rush County | 3,143 | 3,197 | 3,169 | 3,203 | 3,304 | 3,378 | 3,390 | 3,423 | 3,494 | 3,534 | 3,551 |
| Russell County | 6,596 | 6,633 | 6,724 | 6,701 | 6,769 | 6,954 | 6,936 | 7,007 | 7,151 | 7,353 | 7,370 |
| Saline County | 54,364 | 54,109 | 54,105 | 53,914 | 53,888 | 53,808 | 53,738 | 53,988 | 53,869 | 53,646 | 53,597 |
| Scott County | 4,560 | 4,517 | 4,523 | 4,572 | 4,629 | 4,601 | 4,775 | 4,900 | 5,077 | 5,096 | 5,120 |
| Sedgwick County | 490,864 | 482,317 | 475,075 | 468,338 | 464,383 | 461,872 | 460,981 | 459,961 | 456,251 | 453,546 | 452,869 |
| Seward County | 23,013 | 22,747 | 22,637 | 22,396 | 22,449 | 22,623 | 22,688 | 22,702 | 22,518 | 22,545 | 22,510 |
| Shawnee County | 176,255 | 175,073 | 173,764 | 172,563 | 171,568 | 171,178 | 170,744 | 170,349 | 170,345 | 170,063 | 169,871 |
| Sheridan County | 2,435 | 2,463 | 2,454 | 2,478 | 2,524 | 2,521 | 2,603 | 2,636 | 2,708 | 2,794 | 2,813 |
| Sherman County | 5,860 | 5,891 | 5,890 | 5,872 | 6,064 | 6,113 | 6,237 | 6,359 | 6,589 | 6,746 | 6,760 |
| Smith County | 3,753 | 3,852 | 3,946 | 3,997 | 4,082 | 4,153 | 4,219 | 4,291 | 4,406 | 4,515 | 4,536 |
| Stafford County | 4,342 | 4,346 | 4,400 | 4,387 | 4,427 | 4,432 | 4,529 | 4,627 | 4,712 | 4,751 | 4,789 |
| Stanton County | 2,107 | 2,126 | 2,136 | 2,174 | 2,218 | 2,328 | 2,350 | 2,413 | 2,410 | 2,402 | 2,406 |
| Stevens County | 5,129 | 5,055 | 5,045 | 5,169 | 5,323 | 5,405 | 5,308 | 5,330 | 5,366 | 5,449 | 5,463 |
| Sumner County | 23,488 | 23,668 | 23,757 | 24,038 | 24,404 | 24,834 | 25,011 | 25,352 | 25,631 | 25,947 | 25,946 |
| Thomas County | 7,343 | 7,344 | 7,387 | 7,471 | 7,554 | 7,745 | 7,905 | 8,031 | 8,120 | 8,176 | 8,180 |
| Trego County | 2,920 | 2,922 | 2,942 | 2,961 | 3,001 | 3,102 | 3,087 | 3,136 | 3,229 | 3,292 | 3,319 |
| Wabaunsee County | 6,846 | 6,879 | 6,815 | 6,688 | 6,793 | 6,721 | 6,686 | 6,705 | 6,779 | 6,873 | 6,885 |
| Wallace County | 1,408 | 1,395 | 1,432 | 1,488 | 1,498 | 1,537 | 1,605 | 1,662 | 1,694 | 1,740 | 1,749 |
| Washington County | 5,683 | 5,762 | 5,804 | 5,884 | 5,973 | 6,045 | 6,149 | 6,219 | 6,319 | 6,472 | 6,483 |
| Wichita County | 2,109 | 2,117 | 2,168 | 2,203 | 2,289 | 2,293 | 2,388 | 2,426 | 2,499 | 2,518 | 2,531 |
| Wilson County | 9,474 | 9,595 | 9,778 | 9,733 | 9,758 | 9,778 | 10,053 | 10,103 | 10,216 | 10,304 | 10,332 |
| Woodson County | 3,240 | 3,271 | 3,290 | 3,377 | 3,475 | 3,454 | 3,552 | 3,595 | 3,745 | 3,763 | 3,788 |
| Wyandotte County | 155,085 | 153,968 | 153,317 | 152,810 | 153,586 | 154,271 | 155,790 | 157,236 | 158,246 | 157,857 | 157,882 |
Source: Population Division, U.S. Census Bureau