City in Pennington County, Minnesota · 6 sq mi · 1,466 people per sq mi
8,799 people live in Thief River Falls. The typical household earns $71,144, and the median resident is 37.8 years old.
2026 projection
From 8,749 in 2020
Poverty rate 12.16%
Men 36.8 · Women 39.8
1890–2026
8,799
2026 projection
0.6% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
1890–2026
8,799
2026 projection
0.6% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 8,799 | 0 | 0.00% |
|---|---|---|---|
| 2025 | 8,799 | -40 | 0.45% |
| 2024 | 8,839 | +6 | 0.07% |
| 2023 | 8,833 | -63 | 0.71% |
| 2022 | 8,896 | +109 | 1.24% |
| 2021 | 8,787 | +38 | 0.43% |
| 2020 | 8,749 | -83 | 0.94% |
| 2019 | 8,832 | +2 | 0.02% |
| 2018 | 8,830 | -8 | 0.09% |
| 2017 | 8,838 | +11 | 0.12% |
Showing 10 of 29 years.
The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.
Thief River Falls has a population change higher than Pennington County, and lower than Minnesota and the U.S.
Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.
Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 88 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 8 residents
45% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 45% | 45% | 45% |
| Never married | 34% | 41% | 28% |
| Divorced | 12% | 9% | 15% |
| Widowed | 8% | 4% | 12% |
| Separated | <1% | <1% | <1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
14 sources