Oak Valley township
- County:
- Otter Tail County
- County Seat:
- No
- Area (mi²):
- 35.57
- State:
- Minnesota
Oak Valley township is located in Otter Tail County, Minnesota. Oak Valley township has a 2026 population of 366. Oak Valley township is currently declining at a rate of -0.27% annually and its population has decreased by 0% since the most recent census, which recorded a population of 366 in 2020.
The median household income in Oak Valley township is $65,000 with a poverty rate of 22.91%. The median age in Oak Valley township is 32.6 years: 30.6 years for males, and 36.5 years for females. For every 100 females there are 111.1 males.