This is a 3.8 percent fall in Sioux County’s population, from 3,884 in 2020 to 3,738 in 2021.
Sioux County had the 30th largest population in North Dakota in 2021.
The US Census Bureau found more than 73 percent of counties in the US saw a natural decrease in population in 2021. This is up from a 55.5 percent increase in 2020.
The Midwest suffered the most sustained population decreases, with many counties along the US East Coast and through the Rocky Mountains seeing increases.
The US population continues to grow, though at a slower rate than before.
North Dakota Counties By Population Change from 2020 to 2021
| County | 2020 Estimated Population | 2021 Estimated Population | % Change in Population From Year to Year |
|---|---|---|---|
| Billings County | 931 | 955 | 2.6% |
| Golden Valley County | 1,730 | 1,770 | 2.3% |
| Nelson County | 2,989 | 3,054 | 2.2% |
| Grant County | 2,281 | 2,323 | 1.8% |
| Cass County | 184,868 | 186,562 | 0.9% |
| Morton County | 33,333 | 33,611 | 0.8% |
| Sheridan County | 1,258 | 1,268 | 0.8% |
| Steele County | 1,797 | 1,810 | 0.7% |
| McLean County | 9,749 | 9,796 | 0.5% |
| Burleigh County | 98,467 | 98,933 | 0.5% |
| Oliver County | 1,866 | 1,873 | 0.4% |
| Traill County | 7,974 | 8,003 | 0.4% |
| Stutsman County | 21,529 | 21,576 | 0.2% |
| Richland County | 16,524 | 16,560 | 0.2% |
| Bottineau County | 6,377 | 6,390 | 0.2% |
| Eddy County | 2,333 | 2,337 | 0.2% |
| Ramsey County | 11,555 | 11,572 | 0.1% |
| Towner County | 2,138 | 2,140 | 0.1% |
| McIntosh County | 2,512 | 2,513 | 0% |
| Mercer County | 8,330 | 8,323 | -0.1% |
| Logan County | 1,885 | 1,883 | -0.1% |
| Renville County | 2,272 | 2,266 | -0.3% |
| Barnes County | 10,836 | 10,806 | -0.3% |
| Emmons County | 3,282 | 3,271 | -0.3% |
| Sargent County | 3,842 | 3,829 | -0.3% |
| Pierce County | 3,968 | 3,953 | -0.4% |
| LaMoure County | 4,083 | 4,066 | -0.4% |
| Divide County | 2,198 | 2,188 | -0.5% |
| Walsh County | 10,520 | 10,469 | -0.5% |
| Grand Forks County | 73,062 | 72,705 | -0.5% |
| Ransom County | 5,703 | 5,675 | -0.5% |
| Kidder County | 2,384 | 2,369 | -0.6% |
| Griggs County | 2,296 | 2,281 | -0.7% |
| Foster County | 3,389 | 3,364 | -0.7% |
| Cavalier County | 3,693 | 3,662 | -0.8% |
| Pembina County | 6,827 | 6,767 | -0.9% |
| Rolette County | 12,162 | 12,048 | -0.9% |
| Adams County | 2,188 | 2,167 | -1% |
| Ward County | 69,847 | 69,071 | -1.1% |
| Dickey County | 4,959 | 4,897 | -1.3% |
| Wells County | 3,955 | 3,905 | -1.3% |
| McHenry County | 5,322 | 5,249 | -1.4% |
| Burke County | 2,189 | 2,158 | -1.4% |
| Slope County | 701 | 690 | -1.6% |
| Dunn County | 4,103 | 4,035 | -1.7% |
| Hettinger County | 2,474 | 2,430 | -1.8% |
| Mountrail County | 9,765 | 9,576 | -1.9% |
| Stark County | 33,805 | 33,046 | -2.2% |
| Benson County | 5,953 | 5,809 | -2.4% |
| Bowman County | 2,981 | 2,903 | -2.6% |
| Sioux County | 3,884 | 3,738 | -3.8% |
| McKenzie County | 14,744 | 13,819 | -6.3% |
| Williams County | 41,149 | 38,484 | -6.5% |
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