Otter Tail County's 2026 population is estimated at 61,278, reflecting a 0.32% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Otter Tail County is the 17th largest county in Minnesota. The 2010 population was 57,291 and has grown 6.96% since 2010.
Data after 2023 is projected based on recent change
Overall: 46.2 years
Female: 47.4 years
Male: 45.1 years
There are 47,338 adults, (15,374 of whom are seniors) in Otter Tail County.
Female: 29,948 (49.5%)
Male: 30,527 (50.5%)
The racial composition of Otter Tail County includes 91.23% White, and smaller percentages for other race, Black or African American, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 55,169 | 91.23% |
| Two or more races | 2,996 | 4.95% |
| Other race | 1,144 | 1.89% |
| Black or African American | 658 | 1.09% |
| Asian | 349 | 0.58% |
| Native American | 140 | 0.23% |
| Native Hawaiian or Pacific Islander | 19 | 0.03% |
Otter Tail County 's average per capita income is $48,310. Household income levels show a median of $72,255. The poverty rate stands at 8.73%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $102,760 | $121,192 |
| Families | $94,539 | $112,349 |
| Households | $72,255 | $92,523 |
| Non Families | $37,173 | $51,750 |
Average Income
Median Household Income
Poverty Rate