(Links below lead to Quick Facts for North Dakota 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 |
| North Dakota | 641,481 | 637,904 | 636,453 | 635,222 | 636,196 | 632,689 | 633,521 | 636,211 | 641,183 | 642,200 |
|---|---|---|---|---|---|---|---|---|---|---|
| Adams County | 2,244 | 2,267 | 2,284 | 2,352 | 2,395 | 2,437 | 2,488 | 2,531 | 2,576 | 2,593 |
| Barnes County | 10,682 | 10,761 | 10,859 | 10,983 | 11,067 | 11,098 | 11,219 | 11,418 | 11,704 | 11,775 |
| Benson County | 6,953 | 6,937 | 6,920 | 6,910 | 6,926 | 6,849 | 6,804 | 6,945 | 6,957 | 6,964 |
| Billings County | 811 | 796 | 773 | 788 | 805 | 830 | 860 | 883 | 877 | 888 |
| Bottineau County | 6,338 | 6,397 | 6,487 | 6,615 | 6,663 | 6,772 | 6,823 | 6,984 | 7,119 | 7,149 |
| Bowman County | 3,019 | 2,942 | 2,936 | 2,966 | 3,066 | 3,039 | 3,053 | 3,099 | 3,229 | 3,242 |
| Burke County | 1,820 | 1,851 | 1,903 | 1,967 | 2,021 | 2,061 | 2,104 | 2,165 | 2,232 | 2,242 |
| Burleigh County | 78,689 | 77,256 | 75,636 | 74,136 | 72,626 | 71,851 | 71,023 | 70,095 | 69,531 | 69,416 |
| Cass County | 139,918 | 137,335 | 134,882 | 132,362 | 130,971 | 127,626 | 125,960 | 124,879 | 123,485 | 123,138 |
| Cavalier County | 3,841 | 3,895 | 4,048 | 4,214 | 4,317 | 4,431 | 4,542 | 4,652 | 4,803 | 4,831 |
| Dickey County | 5,237 | 5,359 | 5,377 | 5,456 | 5,550 | 5,481 | 5,585 | 5,666 | 5,751 | 5,757 |
| Divide County | 1,986 | 1,999 | 2,043 | 2,089 | 2,158 | 2,174 | 2,181 | 2,172 | 2,264 | 2,283 |
| Dunn County | 3,318 | 3,293 | 3,307 | 3,316 | 3,358 | 3,457 | 3,500 | 3,554 | 3,595 | 3,600 |
| Eddy County | 2,388 | 2,421 | 2,453 | 2,548 | 2,591 | 2,616 | 2,628 | 2,670 | 2,741 | 2,757 |
| Emmons County | 3,377 | 3,473 | 3,608 | 3,727 | 3,875 | 3,962 | 4,064 | 4,186 | 4,301 | 4,331 |
| Foster County | 3,447 | 3,477 | 3,527 | 3,527 | 3,484 | 3,491 | 3,561 | 3,629 | 3,736 | 3,759 |
| Golden Valley County | 1,640 | 1,666 | 1,664 | 1,699 | 1,734 | 1,797 | 1,822 | 1,862 | 1,916 | 1,924 |
| Grand Forks County | 66,585 | 66,026 | 67,036 | 66,503 | 67,015 | 65,327 | 65,238 | 65,385 | 65,947 | 66,109 |
| Grant County | 2,415 | 2,453 | 2,502 | 2,560 | 2,596 | 2,659 | 2,711 | 2,802 | 2,833 | 2,841 |
| Griggs County | 2,359 | 2,400 | 2,421 | 2,472 | 2,495 | 2,550 | 2,579 | 2,634 | 2,730 | 2,754 |
| Hettinger County | 2,378 | 2,415 | 2,479 | 2,489 | 2,520 | 2,499 | 2,578 | 2,624 | 2,691 | 2,715 |
| Kidder County | 2,290 | 2,320 | 2,379 | 2,394 | 2,505 | 2,538 | 2,544 | 2,622 | 2,713 | 2,753 |
| LaMoure County | 3,986 | 4,106 | 4,177 | 4,282 | 4,419 | 4,473 | 4,533 | 4,611 | 4,675 | 4,701 |
| Logan County | 1,943 | 1,960 | 1,962 | 2,015 | 2,075 | 2,116 | 2,183 | 2,214 | 2,299 | 2,308 |
| McHenry County | 5,168 | 5,211 | 5,363 | 5,441 | 5,566 | 5,668 | 5,719 | 5,818 | 5,950 | 5,987 |
| McIntosh County | 2,639 | 2,730 | 2,874 | 2,953 | 3,040 | 3,164 | 3,210 | 3,304 | 3,376 | 3,390 |
| McKenzie County | 5,674 | 5,593 | 5,537 | 5,534 | 5,465 | 5,500 | 5,618 | 5,606 | 5,714 | 5,737 |
| McLean County | 8,337 | 8,321 | 8,342 | 8,438 | 8,655 | 8,840 | 8,945 | 9,106 | 9,251 | 9,311 |
| Mercer County | 7,854 | 7,947 | 7,978 | 8,099 | 8,218 | 8,332 | 8,425 | 8,484 | 8,595 | 8,644 |
| Morton County | 26,255 | 25,871 | 25,519 | 25,252 | 25,118 | 25,000 | 25,067 | 25,072 | 25,311 | 25,303 |
| Mountrail County | 6,511 | 6,456 | 6,376 | 6,475 | 6,505 | 6,457 | 6,477 | 6,541 | 6,603 | 6,631 |
| Nelson County | 3,166 | 3,213 | 3,255 | 3,376 | 3,404 | 3,404 | 3,450 | 3,587 | 3,696 | 3,715 |
| Oliver County | 1,695 | 1,720 | 1,749 | 1,787 | 1,829 | 1,872 | 1,922 | 1,967 | 2,053 | 2,065 |
| Pembina County | 7,419 | 7,564 | 7,744 | 7,858 | 8,050 | 8,160 | 8,184 | 8,344 | 8,551 | 8,585 |
| Pierce County | 4,091 | 4,105 | 4,158 | 4,200 | 4,290 | 4,389 | 4,496 | 4,569 | 4,656 | 4,675 |
| Ramsey County | 11,234 | 11,186 | 11,213 | 11,295 | 11,417 | 11,539 | 11,778 | 11,823 | 12,023 | 12,066 |
| Ransom County | 5,628 | 5,704 | 5,675 | 5,754 | 5,778 | 5,827 | 5,815 | 5,850 | 5,885 | 5,890 |
| Renville County | 2,245 | 2,299 | 2,372 | 2,402 | 2,424 | 2,462 | 2,514 | 2,521 | 2,591 | 2,610 |
| Richland County | 16,334 | 16,490 | 16,756 | 17,163 | 17,345 | 17,538 | 17,380 | 17,598 | 17,944 | 17,998 |
| Rolette County | 13,657 | 13,617 | 13,563 | 13,615 | 13,620 | 13,577 | 13,679 | 13,731 | 13,678 | 13,674 |
| Sargent County | 4,048 | 4,099 | 4,133 | 4,102 | 4,064 | 4,128 | 4,241 | 4,329 | 4,355 | 4,366 |
| Sheridan County | 1,266 | 1,316 | 1,369 | 1,405 | 1,440 | 1,513 | 1,565 | 1,620 | 1,697 | 1,710 |
| Sioux County | 4,232 | 4,197 | 4,184 | 4,090 | 4,084 | 4,045 | 4,052 | 3,998 | 4,058 | 4,044 |
| Slope County | 675 | 658 | 689 | 685 | 695 | 714 | 727 | 739 | 760 | 767 |
| Stark County | 22,575 | 22,428 | 22,110 | 22,120 | 22,095 | 22,093 | 22,153 | 22,358 | 22,553 | 22,636 |
| Steele County | 1,795 | 1,838 | 1,906 | 1,972 | 2,023 | 2,049 | 2,096 | 2,164 | 2,239 | 2,258 |
| Stutsman County | 20,394 | 20,457 | 20,736 | 20,779 | 20,885 | 21,122 | 21,372 | 21,563 | 21,843 | 21,908 |
| Towner County | 2,202 | 2,287 | 2,387 | 2,466 | 2,542 | 2,617 | 2,703 | 2,769 | 2,857 | 2,876 |
| Traill County | 7,820 | 8,006 | 7,984 | 8,111 | 8,190 | 8,169 | 8,244 | 8,310 | 8,467 | 8,477 |
| Walsh County | 10,880 | 11,018 | 11,208 | 11,383 | 11,493 | 11,659 | 11,785 | 12,099 | 12,356 | 12,389 |
| Ward County | 55,986 | 55,947 | 56,028 | 56,496 | 57,026 | 56,817 | 57,138 | 57,754 | 58,685 | 58,795 |
| Wells County | 4,191 | 4,262 | 4,338 | 4,476 | 4,565 | 4,648 | 4,768 | 4,875 | 5,079 | 5,102 |
| Williams County | 19,846 | 19,559 | 19,244 | 19,125 | 19,138 | 19,252 | 19,415 | 19,430 | 19,652 | 19,761 |
Source: Population Division, U.S. Census Bureau