| County | Rank | Change (2020) ↓ | 2025 Pop. | 2020 Pop. |
|---|---|---|---|---|
| Billings County | 1 | 16.7% | 1,090 | 934 |
| Cass County | 2 | 10.19% | 203,733 | 184,897 |
| Golden Valley County | 3 | 6.46% | 1,830 | 1,719 |
| Renville County | 4 | 6.35% | 2,427 | 2,282 |
| Burleigh County | 5 | 6.23% | 104,730 | 98,589 |
| McKenzie County | 6 | 3.42% | 15,282 | 14,776 |
| Morton County | 7 | 3.06% | 34,341 | 33,322 |
| Williams County | 8 | 2.51% | 42,222 | 41,189 |
| Stark County | 9 | 1.72% | 34,417 | 33,835 |
| Grand Forks County | 10 | 1.66% | 74,344 | 73,132 |
| Oliver County | 11 | 1.23% | 1,891 | 1,868 |
| Bottineau County | 12 | 1.13% | 6,447 | 6,375 |
| Richland County | 13 | 1.09% | 16,712 | 16,532 |
| McLean County | 14 | 0.93% | 9,854 | 9,763 |
| Eddy County | 15 | 0.82% | 2,340 | 2,321 |
| Traill County | 16 | 0.53% | 8,021 | 7,979 |
| Mercer County | 17 | 0.31% | 8,374 | 8,348 |
| Nelson County | 18 | 0.17% | 3,004 | 2,999 |
| Stutsman County | 19 | 0.07% | 21,570 | 21,554 |
| Barnes County | 20 | -0.12% | 10,829 | 10,842 |
| Sheridan County | 21 | -0.24% | 1,259 | 1,262 |
| Logan County | 22 | -0.32% | 1,874 | 1,880 |
| Kidder County | 23 | -0.42% | 2,382 | 2,392 |
| Ramsey County | 24 | -0.7% | 11,503 | 11,584 |
| Dickey County | 25 | -0.81% | 4,920 | 4,960 |
| Steele County | 26 | -1.23% | 1,768 | 1,790 |
| Burke County | 27 | -1.41% | 2,161 | 2,192 |
| LaMoure County | 28 | -1.51% | 4,034 | 4,096 |
| Adams County | 29 | -1.93% | 2,139 | 2,181 |
| Hettinger County | 30 | -1.94% | 2,420 | 2,468 |
| Grant County | 31 | -2.01% | 2,245 | 2,291 |
| Ransom County | 32 | -2.09% | 5,574 | 5,693 |
| Dunn County | 33 | -2.12% | 4,011 | 4,098 |
| Ward County | 34 | -2.13% | 68,435 | 69,922 |
| Foster County | 35 | -2.24% | 3,312 | 3,388 |
| Bowman County | 36 | -2.65% | 2,902 | 2,981 |
| Mountrail County | 37 | -2.88% | 9,521 | 9,803 |
| Sioux County | 38 | -2.94% | 3,767 | 3,881 |
| McIntosh County | 39 | -3.26% | 2,434 | 2,516 |
| Towner County | 40 | -3.41% | 2,066 | 2,139 |
| Emmons County | 41 | -3.46% | 3,177 | 3,291 |
| Benson County | 42 | -3.47% | 5,734 | 5,940 |
| Walsh County | 43 | -3.7% | 10,135 | 10,524 |
| McHenry County | 44 | -3.72% | 5,118 | 5,316 |
| Griggs County | 45 | -4.22% | 2,204 | 2,301 |
| Pierce County | 46 | -4.5% | 3,796 | 3,975 |
| Cavalier County | 47 | -4.62% | 3,529 | 3,700 |
| Divide County | 48 | -4.76% | 2,100 | 2,205 |
| Rolette County | 49 | -4.77% | 11,618 | 12,200 |
| Pembina County | 50 | -4.98% | 6,486 | 6,826 |
| Sargent County | 51 | -5.65% | 3,626 | 3,843 |
| Wells County | 52 | -5.72% | 3,740 | 3,967 |
| Slope County | 53 | -8.69% | 641 | 702 |
North Dakota's counties show varied growth patterns from 2020 to 2025. Billings County leads with 16.7% annualized growth, followed by Cass County (10.19%) and Golden Valley County (6.46%). The largest counties are Cass County (203,733), Burleigh County (104,730), and Grand Forks County (74,344). Of the 53 counties in North Dakota, 19 are growing while 34 have experienced population decline. Overall, counties averaged -0.64% annualized growth, with total population growing by 3.15% annually.
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