Kansas County Population Estimates
*Estimates obtained from KDHE's KIC Kansas Population Estimates database: http://kic.kdhe.state.ks.us/kic/index2.html
| County | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 |
| Allen | 14,551 | 14,444 | 14,377 | 14,230 | 14,234 | 13,907 | 13,949 | 13,787 | 13,677 | 13,414 | 13,319 |
| Anderson | 8,040 | 8,144 | 8,097 | 8,186 | 8,147 | 8,208 | 8,191 | 8,182 | 8,051 | 7,908 | 7,984 |
| Atchison | 16,797 | 16,823 | 16,757 | 16,775 | 16,683 | 16,741 | 16,848 | 16,804 | 16,745 | 16,571 | 16,481 |
| Barber | 5,407 | 5,331 | 5,291 | 5,162 | 5,085 | 5,034 | 4,999 | 4,958 | 4,974 | 4,786 | 4,674 |
| Barton | 28,790 | 28,501 | 28,126 | 27,855 | 27,743 | 27,467 | 27,367 | 28,105 | 27,511 | 27,768 | 27,703 |
| Bourbon | 15,488 | 15,316 | 15,389 | 15,355 | 15,171 | 15,086 | 15,066 | 14,997 | 14,950 | 14,803 | 14,851 |
| Brown | 10,950 | 10,802 | 10,712 | 10,643 | 10,501 | 10,442 | 10,362 | 10,239 | 10,236 | 10,068 | 10,009 |
| Butler | 58,724 | 59,186 | 59,685 | 59,997 | 60,534 | 61,127 | 61,828 | 62,354 | 63,147 | 63,045 | 63,562 |
| Chase | 3,066 | 3,003 | 3,032 | 2,958 | 2,930 | 3,107 | 3,068 | 3,081 | 3,070 | 2,882 | 2,804 |
| Chautauqua | 4,395 | 4,366 | 4,350 | 4,277 | 4,210 | 4,185 | 4,178 | 4,109 | 3,953 | 3,806 | 3,768 |
| Cherokee | 22,740 | 22,678 | 22,556 | 22,273 | 21,953 | 21,815 | 21,950 | 21,555 | 21,451 | 21,337 | 21,082 |
| Cheyenne | 3,130 | 3,214 | 3,160 | 3,139 | 3,123 | 2,955 | 2,979 | 2,946 | 2,911 | 2,801 | 2,742 |
| Clark | 2,403 | 2,413 | 2,386 | 2,395 | 2,382 | 2,333 | 2,343 | 2,283 | 2,206 | 2,094 | 2,108 |
| Clay | 8,905 | 8,829 | 8,831 | 8,763 | 8,704 | 8,573 | 8,597 | 8,629 | 8,625 | 8,685 | 8,859 |
| Cloud | 10,398 | 10,375 | 10,221 | 10,070 | 9,932 | 9,859 | 9,779 | 9,759 | 9,594 | 9,382 | 9,453 |
| Coffey | 8,762 | 8,839 | 8,880 | 8,845 | 8,902 | 8,815 | 8,759 | 8,683 | 8,701 | 8,454 | 8,409 |
| Comanche | 2,041 | 2,008 | 1,956 | 1,990 | 1,985 | 1,915 | 1,903 | 1,935 | 1,884 | 1,888 | 1,950 |
| Cowley | 36,678 | 36,444 | 36,280 | 35,974 | 36,427 | 35,860 | 35,772 | 35,298 | 34,931 | 34,251 | 34,065 |
| Crawford | 37,971 | 38,195 | 38,221 | 38,241 | 38,052 | 38,398 | 38,060 | 38,222 | 38,059 | 38,860 | 38,868 |
| Decatur | 3,570 | 3,504 | 3,461 | 3,454 | 3,407 | 3,295 | 3,274 | 3,191 | 3,120 | 2,955 | 2,912 |
| Dickinson | 19,314 | 19,323 | 19,370 | 19,107 | 19,144 | 19,255 | 19,132 | 19,209 | 19,322 | 18,957 | 19,328 |
| Doniphan | 8,068 | 8,201 | 8,248 | 8,277 | 8,215 | 8,149 | 8,062 | 7,816 | 7,865 | 7,756 | 7,753 |
| Douglas | 97,566 | 99,490 | 100,176 | 101,162 | 102,316 | 102,983 | 102,786 | 102,914 | 112,123 | 113,488 | 114,748 |
| Edwards | 3,480 | 3,498 | 3,430 | 3,369 | 3,337 | 3,275 | 3,308 | 3,292 | 3,138 | 3,106 | 3,082 |
| Elk | 3,344 | 3,333 | 3,227 | 3,193 | 3,138 | 3,167 | 3,117 | 3,075 | 3,077 | 3,040 | 3,047 |
| Ellis | 27,777 | 27,641 | 27,423 | 27,385 | 27,274 | 27,212 | 27,060 | 26,767 | 26,926 | 27,464 | 27,801 |
| Ellsworth | 6,525 | 6,487 | 6,530 | 6,467 | 6,418 | 6,347 | 6,350 | 6,343 | 6,332 | 6,310 | 6,250 |
| Finney | 38,833 | 39,863 | 40,645 | 40,393 | 39,732 | 39,176 | 39,271 | 38,988 | 39,097 | 38,295 | 40,998 |
| Ford | 31,580 | 31,992 | 32,601 | 32,559 | 32,662 | 33,012 | 33,278 | 33,751 | 33,783 | 33,340 | 33,293 |
| Franklin | 24,416 | 24,626 | 24,871 | 25,055 | 25,322 | 25,540 | 26,049 | 26,247 | 26,513 | 26,479 | 26,562 |
| Geary | 28,203 | 28,162 | 27,761 | 27,178 | 26,410 | 26,313 | 25,111 | 24,585 | 24,174 | 25,150 | 31,171 |
| Gove | 3,113 | 3,091 | 3,067 | 3,026 | 2,992 | 2,910 | 2,845 | 2,763 | 2,721 | 2,637 | 2,548 |
| Graham | 3,092 | 3,001 | 2,922 | 2,869 | 2,847 | 2,808 | 2,745 | 2,721 | 2,677 | 2,607 | 2,592 |
| Grant | 8,091 | 7,968 | 7,887 | 7,813 | 7,895 | 7,745 | 7,685 | 7,530 | 7,552 | 7,497 | 7,395 |
| Gray | 5,781 | 5,844 | 5,924 | 5,967 | 6,045 | 6,063 | 5,980 | 5,861 | 5,852 | 5,641 | 5,688 |
| Greeley | 1,587 | 1,539 | 1,543 | 1,532 | 1,472 | 1,420 | 1,415 | 1,349 | 1,331 | 1,297 | 1,266 |
| Greenwood | 7,845 | 7,703 | 7,668 | 7,723 | 7,653 | 7,485 | 7,538 | 7,338 | 7,067 | 6,993 | 6,861 |
| Hamilton | 2,659 | 2,672 | 2,666 | 2,678 | 2,658 | 2,666 | 2,654 | 2,604 | 2,594 | 2,632 | 2,631 |
| Harper | 6,630 | 6,589 | 6,503 | 6,430 | 6,278 | 6,206 | 6,238 | 6,081 | 5,952 | 5,819 | 5,857 |
| Harvey | 33,036 | 32,981 | 32,882 | 33,004 | 33,375 | 33,502 | 33,769 | 33,843 | 33,643 | 33,493 | 33,675 |
| Haskell | 4,155 | 4,257 | 4,315 | 4,316 | 4,291 | 4,246 | 4,272 | 4,232 | 4,171 | 4,032 | 3,919 |
| Hodgeman | 2,095 | 2,096 | 2,087 | 2,136 | 2,149 | 2,151 | 2,089 | 2,110 | 2,071 | 1,971 | 1,948 |
| Jackson | 12,457 | 12,528 | 12,681 | 12,694 | 12,741 | 13,017 | 13,169 | 13,535 | 13,500 | 13,420 | 13,240 |
| Jefferson | 18,273 | 18,291 | 18,465 | 18,548 | 18,664 | 18,798 | 18,906 | 19,106 | 18,848 | 18,467 | 18,421 |
| Jewell | 3,935 | 3,842 | 3,763 | 3,625 | 3,495 | 3,433 | 3,422 | 3,352 | 3,324 | 3,198 | 3,142 |
| Johnson | 432,723 | 443,434 | 454,159 | 463,934 | 476,536 | 486,515 | 496,691 | 506,562 | 516,731 | 526,319 | 534,093 |
| Kearny | 4,465 | 4,521 | 4,518 | 4,598 | 4,543 | 4,591 | 4,515 | 4,516 | 4,469 | 4,148 | 4,159 |
| Kingman | 8,555 | 8,631 | 8,678 | 8,567 | 8,426 | 8,382 | 8,390 | 8,165 | 7,975 | 7,826 | 7,719 |
| Kiowa | 3,421 | 3,355 | 3,254 | 3,147 | 3,107 | 3,152 | 3,084 | 2,984 | 2,969 | 2,953 | 2,541 |
| Labette | 23,103 | 23,027 | 22,750 | 22,452 | 22,281 | 22,259 | 22,269 | 22,169 | 22,203 | 21,973 | 21,871 |
| Lane | 2,251 | 2,180 | 2,144 | 2,084 | 2,000 | 1,946 | 1,950 | 1,894 | 1,797 | 1,746 | 1,743 |
| Leavenworth | 68,301 | 68,368 | 68,907 | 69,737 | 70,789 | 71,546 | 72,439 | 73,113 | 73,628 | 73,603 | 74,276 |
| Lincoln | 3,544 | 3,580 | 3,575 | 3,575 | 3,542 | 3,498 | 3,416 | 3,411 | 3,396 | 3,285 | 3,261 |
| Linn | 9,266 | 9,442 | 9,603 | 9,668 | 9,674 | 9,722 | 9,775 | 9,914 | 9,962 | 9,767 | 9,616 |
| Logan | 3,081 | 3,038 | 3,048 | 3,006 | 2,998 | 2,855 | 2,827 | 2,794 | 2,675 | 2,628 | 2,593 |
| Lyon | 35,524 | 35,773 | 35,975 | 36,055 | 35,904 | 35,805 | 35,717 | 35,609 | 35,369 | 35,981 | 35,562 |
| Marion | 29,090 | 29,449 | 29,583 | 29,533 | 29,413 | 29,346 | 29,413 | 29,523 | 29,380 | 29,196 | 29,044 |
| Marshall | 13,461 | 13,357 | 13,374 | 13,333 | 13,248 | 13,299 | 13,010 | 12,952 | 12,760 | 12,238 | 12,100 |
| McPherson | 11,034 | 11,005 | 10,936 | 10,809 | 10,583 | 10,589 | 10,402 | 10,405 | 10,349 | 10,186 | 10,178 |
| Meade | 4,583 | 4,577 | 4,638 | 4,648 | 4,620 | 4,662 | 4,592 | 4,625 | 4,561 | 4,403 | 4,359 |
| Miami | 27,121 | 27,875 | 28,496 | 28,664 | 28,904 | 29,187 | 29,712 | 30,496 | 30,900 | 31,078 | 30,989 |
| Mitchell | 6,986 | 6,982 | 6,914 | 6,793 | 6,693 | 6,707 | 6,564 | 6,420 | 6,299 | 6,307 | 6,292 |
| Montgomery | 36,813 | 36,506 | 36,196 | 35,789 | 35,307 | 34,934 | 34,975 | 34,570 | 34,692 | 34,511 | 34,395 |
| Morris | 6,103 | 6,096 | 6,113 | 6,104 | 6,082 | 5,995 | 5,977 | 6,049 | 6,046 | 5,967 | 6,037 |
| Morton | 3,483 | 3,537 | 3,486 | 3,379 | 3,360 | 3,317 | 3,269 | 3,196 | 3,138 | 3,038 | 2,978 |
| Nemaha | 10,653 | 10,700 | 10,691 | 10,477 | 10,463 | 10,500 | 10,458 | 10,443 | 10,374 | 10,201 | 10,112 |
| Neosho | 17,112 | 17,088 | 16,946 | 16,837 | 16,638 | 16,580 | 16,555 | 16,529 | 16,298 | 16,228 | 16,223 |
| Ness | 3,557 | 3,485 | 3,442 | 3,371 | 3,316 | 3,158 | 3,080 | 3,009 | 2,946 | 2,991 | 2,945 |
| Norton | 6,018 | 5,940 | 5,954 | 5,875 | 5,879 | 5,796 | 5,799 | 5,664 | 5,584 | 5,422 | 5,370 |
| Osage | 16,614 | 16,590 | 16,766 | 16,747 | 16,928 | 16,784 | 17,091 | 17,150 | 16,958 | 16,459 | 16,327 |
| Osborne | 4,590 | 4,493 | 4,433 | 4,338 | 4,236 | 4,179 | 4,100 | 4,050 | 3,978 | 3,871 | 3,804 |
| Ottawa | 6,065 | 6,106 | 6,195 | 6,172 | 6,289 | 6,177 | 6,175 | 6,123 | 6,168 | 6,006 | 6,026 |
| Pawnee | 7,310 | 7,267 | 7,220 | 7,038 | 6,946 | 6,796 | 6,795 | 6,739 | 6,515 | 6,415 | 6,291 |
| Phillips | 6,103 | 6,046 | 5,999 | 5,912 | 5,871 | 5,657 | 5,583 | 5,504 | 5,444 | 5,356 | 5,339 |
| Pottawatomie | 17,872 | 18,041 | 18,286 | 18,357 | 18,489 | 18,714 | 18,871 | 19,129 | 19,220 | 19,396 | 19,695 |
| Pratt | 9,810 | 9,650 | 9,630 | 9,506 | 9,541 | 9,437 | 9,417 | 9,496 | 9,436 | 9,426 | 9,411 |
| Rawlins | 3,093 | 2,983 | 2,960 | 2,914 | 2,887 | 2,843 | 2,765 | 2,672 | 2,643 | 2,558 | 2,503 |
| Reno | 64,425 | 64,920 | 64,681 | 64,369 | 63,790 | 63,832 | 63,676 | 63,558 | 63,706 | 63,145 | 63,427 |
| Republic | 6,011 | 5,900 | 5,805 | 5,666 | 5,468 | 5,307 | 5,224 | 5,164 | 5,033 | 4,901 | 4,812 |
| Rice | 10,934 | 10,788 | 10,739 | 10,591 | 10,501 | 10,412 | 10,497 | 10,452 | 10,295 | 10,080 | 10,060 |
| Riley | 63,212 | 62,920 | 62,889 | 61,978 | 61,480 | 62,291 | 63,069 | 62,826 | 62,527 | 69,083 | 71,069 |
| Rooks | 5,749 | 5,708 | 5,661 | 5,595 | 5,492 | 5,417 | 5,386 | 5,351 | 5,290 | 5,160 | 5,136 |
| Rush | 3,611 | 3,593 | 3,541 | 3,525 | 3,492 | 3,418 | 3,466 | 3,406 | 3,317 | 3,211 | 3,232 |
| Russell | 7,502 | 7,427 | 7,350 | 7,149 | 7,055 | 6,907 | 6,978 | 6,845 | 6,740 | 6,737 | 6,641 |
| Saline | 53,182 | 53,485 | 53,606 | 53,768 | 53,910 | 53,737 | 53,943 | 53,919 | 54,170 | 54,583 | 54,657 |
| Scott | 5,176 | 5,139 | 5,099 | 5,069 | 4,923 | 4,806 | 4,691 | 4,600 | 4,643 | 4,568 | 4,577 |
| Sedgwick | 447,971 | 451,808 | 453,551 | 456,968 | 461,937 | 462,896 | 463,802 | 466,061 | 470,895 | 476,026 | 482,863 |
| Seward | 21,987 | 22,206 | 22,562 | 22,674 | 23,072 | 23,091 | 23,237 | 23,274 | 23,404 | 23,109 | 23,016 |
| Shawnee | 169,356 | 169,499 | 170,067 | 170,625 | 170,748 | 170,902 | 171,716 | 172,365 | 172,693 | 173,476 | 174,709 |
| Sheridan | 2,861 | 2,836 | 2,802 | 2,704 | 2,641 | 2,662 | 2,614 | 2,591 | 2,600 | 2,493 | 2,510 |
| Sherman | 6,781 | 6,790 | 6,739 | 6,610 | 6,398 | 6,277 | 6,218 | 6,153 | 5,981 | 5,959 | 6,013 |
| Smith | 4,587 | 4,584 | 4,522 | 4,445 | 4,365 | 4,181 | 4,179 | 4,121 | 4,024 | 3,951 | 3,901 |
| Stafford | 4,927 | 4,865 | 4,769 | 4,745 | 4,662 | 4,589 | 4,512 | 4,488 | 4,435 | 4,387 | 4,326 |
| Stanton | 2,400 | 2,400 | 2,406 | 2,399 | 2,410 | 2,404 | 2,374 | 2,245 | 2,232 | 2,162 | 2,148 |
| Stevens | 5,439 | 5,423 | 5,467 | 5,370 | 5,332 | 5,389 | 5,520 | 5,412 | 5,287 | 5,061 | 5,056 |
| Sumner | 26,183 | 25,974 | 25,981 | 25,755 | 25,533 | 25,256 | 25,272 | 24,797 | 24,441 | 23,888 | 23,616 |
| Thomas | 8,230 | 8,177 | 8,175 | 8,149 | 8,092 | 7,933 | 7,801 | 7,639 | 7,468 | 7,314 | 7,277 |
| Trego | 3,411 | 3,400 | 3,287 | 3,228 | 3,140 | 3,103 | 3,158 | 3,050 | 2,993 | 2,927 | 2,882 |
| Wabaunsee | 6,855 | 6,864 | 6,876 | 6,782 | 6,715 | 6,767 | 6,938 | 6,919 | 6,895 | 6,870 | 6,922 |
| Wallace | 1,801 | 1,787 | 1,737 | 1,698 | 1,692 | 1,621 | 1,579 | 1,573 | 1,557 | 1,456 | 1,404 |
| Washington | 6,533 | 6,505 | 6,469 | 6,330 | 6,271 | 6,131 | 6,107 | 6,009 | 5,944 | 5,840 | 5,791 |
| Wichita | 2,598 | 2,533 | 2,523 | 2,529 | 2,502 | 2,447 | 2,360 | 2,309 | 2,288 | 2,200 | 2,148 |
| Wilson | 10,380 | 10,406 | 10,306 | 10,276 | 10,143 | 10,080 | 9,946 | 9,834 | 9,889 | 9,807 | 9,698 |
| Woodson | 3,903 | 3,868 | 3,764 | 3,788 | 3,668 | 3,631 | 3,553 | 3,572 | 3,507 | 3,318 | 3,285 |
| Wyandotte | 158,228 | 157,980 | 157,891 | 158,833 | 158,331 | 157,092 | 156,487 | 155,750 | 155,509 | 153,956 | 154,287 |