(Links below lead to Quick Facts for Oklahoma 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 |
| Oklahoma | 3,642,361 | 3,608,123 | 3,568,132 | 3,530,087 | 3,511,960 | 3,496,157 | 3,482,946 | 3,463,387 | 3,453,861 | 3,450,654 |
|---|---|---|---|---|---|---|---|---|---|---|
| Adair County | 21,811 | 21,852 | 21,828 | 21,631 | 21,397 | 21,303 | 21,192 | 21,073 | 21,052 | 21,038 |
| Alfalfa County | 5,637 | 5,623 | 5,625 | 5,660 | 5,752 | 5,804 | 5,888 | 5,927 | 6,080 | 6,105 |
| Atoka County | 14,655 | 14,479 | 14,320 | 14,297 | 14,297 | 14,160 | 13,990 | 13,898 | 13,840 | 13,879 |
| Beaver County | 5,248 | 5,333 | 5,304 | 5,402 | 5,455 | 5,522 | 5,569 | 5,644 | 5,792 | 5,857 |
| Beckham County | 21,136 | 20,793 | 19,311 | 18,625 | 18,159 | 19,202 | 19,846 | 19,776 | 19,745 | 19,799 |
| Blaine County | 12,659 | 12,596 | 12,465 | 12,736 | 12,690 | 11,179 | 11,625 | 12,022 | 11,957 | 11,976 |
| Bryan County | 40,109 | 39,298 | 38,780 | 37,647 | 37,359 | 36,865 | 36,764 | 36,459 | 36,598 | 36,534 |
| Caddo County | 29,024 | 29,112 | 29,579 | 29,668 | 29,889 | 29,916 | 29,823 | 29,872 | 30,098 | 30,150 |
| Canadian County | 106,079 | 103,331 | 99,956 | 97,069 | 94,433 | 92,173 | 90,663 | 89,502 | 88,144 | 87,697 |
| Carter County | 47,979 | 47,484 | 47,046 | 46,642 | 46,608 | 46,148 | 45,883 | 45,593 | 45,595 | 45,621 |
| Cherokee County | 45,733 | 45,088 | 44,982 | 44,415 | 44,132 | 43,850 | 43,510 | 43,026 | 42,672 | 42,521 |
| Choctaw County | 14,890 | 14,991 | 15,089 | 15,089 | 15,168 | 15,138 | 15,247 | 15,143 | 15,328 | 15,342 |
| Cimarron County | 2,556 | 2,630 | 2,660 | 2,689 | 2,782 | 2,892 | 2,980 | 3,056 | 3,151 | 3,148 |
| Cleveland County | 239,760 | 235,241 | 231,848 | 225,552 | 222,144 | 219,306 | 215,586 | 212,460 | 208,376 | 208,016 |
| Coal County | 5,721 | 5,698 | 5,606 | 5,686 | 5,831 | 5,886 | 5,929 | 5,997 | 6,004 | 6,031 |
| Comanche County | 111,772 | 113,931 | 112,256 | 111,860 | 113,623 | 110,467 | 111,993 | 112,224 | 114,675 | 114,996 |
| Cotton County | 6,191 | 6,277 | 6,343 | 6,431 | 6,382 | 6,425 | 6,372 | 6,430 | 6,629 | 6,614 |
| Craig County | 15,132 | 15,149 | 15,012 | 15,001 | 14,819 | 14,784 | 14,743 | 14,768 | 14,929 | 14,950 |
| Creek County | 69,822 | 68,940 | 68,206 | 68,092 | 68,163 | 68,336 | 68,357 | 67,910 | 67,570 | 67,367 |
| Custer County | 26,412 | 26,020 | 25,805 | 25,517 | 25,347 | 25,319 | 25,192 | 25,694 | 26,051 | 26,142 |
| Delaware County | 40,425 | 40,329 | 39,692 | 38,968 | 38,789 | 38,497 | 37,932 | 37,641 | 37,195 | 37,077 |
| Dewey County | 4,389 | 4,330 | 4,357 | 4,402 | 4,518 | 4,477 | 4,520 | 4,601 | 4,708 | 4,743 |
| Ellis County | 3,971 | 3,893 | 3,803 | 3,872 | 3,911 | 3,909 | 3,954 | 3,896 | 4,043 | 4,075 |
| Garfield County | 58,167 | 57,504 | 57,199 | 56,961 | 57,182 | 57,156 | 57,119 | 57,181 | 57,690 | 57,813 |
| Garvin County | 27,247 | 27,102 | 26,960 | 26,874 | 26,792 | 26,966 | 27,040 | 27,021 | 27,258 | 27,210 |
| Grady County | 51,066 | 50,446 | 50,037 | 48,967 | 47,950 | 47,093 | 46,631 | 45,849 | 45,570 | 45,516 |
| Grant County | 4,450 | 4,485 | 4,520 | 4,663 | 4,703 | 4,872 | 4,937 | 5,023 | 5,124 | 5,144 |
| Greer County | 5,713 | 5,694 | 5,750 | 5,802 | 5,809 | 5,782 | 5,862 | 5,836 | 6,035 | 6,061 |
| Harmon County | 2,843 | 2,831 | 2,901 | 2,937 | 2,926 | 2,977 | 3,046 | 3,153 | 3,273 | 3,283 |
| Harper County | 3,290 | 3,240 | 3,286 | 3,263 | 3,312 | 3,302 | 3,403 | 3,417 | 3,547 | 3,562 |
| Haskell County | 12,152 | 12,041 | 12,027 | 11,958 | 11,959 | 11,873 | 11,730 | 11,757 | 11,827 | 11,792 |
| Hughes County | 13,625 | 13,576 | 13,635 | 13,722 | 13,766 | 13,839 | 13,939 | 13,879 | 14,125 | 14,154 |
| Jackson County | 25,236 | 25,686 | 26,194 | 26,443 | 27,164 | 27,189 | 27,342 | 27,885 | 28,251 | 28,439 |
| Jefferson County | 6,219 | 6,246 | 6,318 | 6,376 | 6,418 | 6,469 | 6,512 | 6,648 | 6,769 | 6,818 |
| Johnston County | 10,286 | 10,402 | 10,367 | 10,215 | 10,254 | 10,359 | 10,393 | 10,440 | 10,516 | 10,513 |
| Kay County | 45,632 | 45,711 | 45,616 | 46,042 | 46,561 | 47,083 | 47,515 | 47,427 | 47,940 | 48,080 |
| Kingfisher County | 14,300 | 14,304 | 14,093 | 14,067 | 13,969 | 13,957 | 13,815 | 13,842 | 13,885 | 13,926 |
| Kiowa County | 9,399 | 9,428 | 9,590 | 9,777 | 9,746 | 9,863 | 9,951 | 10,023 | 10,198 | 10,227 |
| Latimer County | 10,561 | 10,427 | 10,466 | 10,472 | 10,505 | 10,488 | 10,572 | 10,572 | 10,653 | 10,692 |
| Le Flore County | 49,802 | 49,510 | 49,120 | 48,806 | 48,579 | 48,402 | 48,324 | 48,028 | 48,128 | 48,109 |
| Lincoln County | 32,153 | 32,211 | 32,240 | 32,006 | 32,076 | 32,073 | 32,095 | 32,088 | 32,127 | 32,080 |
| Logan County | 38,102 | 37,123 | 35,763 | 35,406 | 34,972 | 35,395 | 34,704 | 34,519 | 33,942 | 33,924 |
| Love County | 9,155 | 9,096 | 9,068 | 9,034 | 8,946 | 8,844 | 8,793 | 8,728 | 8,827 | 8,831 |
| Major County | 7,112 | 7,167 | 7,173 | 7,177 | 7,260 | 7,304 | 7,477 | 7,530 | 7,529 | 7,545 |
| Marshall County | 14,919 | 14,766 | 14,528 | 14,336 | 13,885 | 13,619 | 13,530 | 13,311 | 13,150 | 13,184 |
| Mayes County | 39,912 | 39,588 | 39,269 | 39,024 | 38,828 | 38,651 | 38,473 | 38,451 | 38,432 | 38,369 |
| McClain County | 32,365 | 31,779 | 30,771 | 29,892 | 29,014 | 28,556 | 28,002 | 27,778 | 27,846 | 27,740 |
| McCurtain County | 33,532 | 33,409 | 33,446 | 33,460 | 33,477 | 33,779 | 33,919 | 34,034 | 34,392 | 34,402 |
| McIntosh County | 19,698 | 19,650 | 19,450 | 19,396 | 19,444 | 19,474 | 19,501 | 19,451 | 19,478 | 19,456 |
| Murray County | 12,784 | 12,661 | 12,720 | 12,580 | 12,509 | 12,570 | 12,585 | 12,659 | 12,592 | 12,623 |
| Muskogee County | 71,278 | 71,012 | 70,611 | 70,211 | 69,897 | 69,938 | 69,492 | 69,494 | 69,411 | 69,451 |
| Noble County | 11,169 | 11,100 | 11,074 | 11,119 | 11,185 | 11,241 | 11,269 | 11,414 | 11,378 | 11,411 |
| Nowata County | 10,729 | 10,688 | 10,623 | 10,627 | 10,600 | 10,779 | 10,553 | 10,595 | 10,594 | 10,569 |
| Okfuskee County | 11,172 | 11,197 | 11,212 | 11,274 | 11,446 | 11,546 | 11,577 | 11,723 | 11,824 | 11,814 |
| Oklahoma County | 706,617 | 699,027 | 692,677 | 685,595 | 679,700 | 676,448 | 672,160 | 665,327 | 661,829 | 660,448 |
| Okmulgee County | 39,219 | 39,344 | 39,119 | 39,332 | 39,549 | 39,579 | 39,514 | 39,580 | 39,637 | 39,685 |
| Osage County | 45,489 | 45,433 | 45,047 | 44,940 | 44,763 | 44,834 | 44,873 | 44,936 | 44,552 | 44,437 |
| Ottawa County | 31,849 | 32,325 | 32,797 | 32,480 | 32,392 | 32,410 | 32,622 | 33,037 | 33,237 | 33,194 |
| Pawnee County | 16,307 | 16,421 | 16,427 | 16,473 | 16,476 | 16,619 | 16,734 | 16,767 | 16,687 | 16,612 |
| Payne County | 78,280 | 77,724 | 77,281 | 75,042 | 74,780 | 73,382 | 71,833 | 70,465 | 68,257 | 68,190 |
| Pittsburg County | 45,115 | 44,636 | 44,328 | 43,940 | 43,661 | 43,703 | 43,780 | 43,356 | 43,951 | 43,953 |
| Pontotoc County | 36,999 | 36,512 | 35,762 | 35,461 | 35,254 | 35,164 | 35,029 | 34,928 | 35,164 | 35,143 |
| Pottawatomie County | 69,616 | 69,226 | 68,163 | 67,723 | 67,413 | 67,544 | 66,605 | 66,264 | 65,673 | 65,521 |
| Pushmataha County | 11,710 | 11,640 | 11,495 | 11,474 | 11,565 | 11,538 | 11,610 | 11,654 | 11,654 | 11,667 |
| Roger Mills County | 3,404 | 3,296 | 3,255 | 3,260 | 3,211 | 3,154 | 3,195 | 3,310 | 3,425 | 3,436 |
| Rogers County | 84,300 | 82,931 | 81,212 | 79,614 | 78,524 | 76,859 | 74,941 | 72,965 | 71,370 | 70,641 |
| Seminole County | 24,200 | 24,103 | 24,135 | 24,127 | 24,187 | 24,098 | 24,197 | 24,499 | 24,871 | 24,894 |
| Sequoyah County | 41,034 | 40,926 | 40,686 | 40,242 | 40,092 | 39,655 | 39,417 | 39,235 | 39,048 | 38,972 |
| Stephens County | 43,498 | 43,255 | 42,764 | 42,560 | 42,456 | 42,262 | 42,462 | 42,624 | 43,072 | 43,182 |
| Texas County | 20,283 | 19,890 | 19,850 | 19,829 | 20,057 | 19,745 | 19,944 | 20,069 | 20,182 | 20,107 |
| Tillman County | 7,899 | 8,117 | 8,249 | 8,347 | 8,575 | 8,737 | 8,801 | 9,185 | 9,242 | 9,287 |
| Tulsa County | 591,982 | 584,141 | 576,166 | 569,407 | 567,207 | 569,198 | 569,943 | 566,657 | 563,819 | 563,299 |
| Wagoner County | 68,960 | 67,135 | 65,008 | 63,141 | 61,994 | 61,090 | 60,180 | 58,755 | 57,698 | 57,491 |
| Washington County | 50,452 | 49,770 | 48,899 | 48,598 | 48,788 | 48,845 | 48,953 | 48,860 | 48,978 | 48,996 |
| Washita County | 11,709 | 11,651 | 11,450 | 11,257 | 11,232 | 11,228 | 11,267 | 11,380 | 11,500 | 11,508 |
| Woods County | 8,422 | 8,448 | 8,383 | 8,543 | 8,571 | 8,644 | 8,839 | 8,847 | 9,043 | 9,089 |
| Woodward County | 19,838 | 19,674 | 19,079 | 18,864 | 18,731 | 18,424 | 18,388 | 18,319 | 18,429 | 18,486 |
Source: Population Division, U.S. Census Bureau