
Oak township
- County:
- Mills County
- County Seat:
- No
- Area (mi²):
- 47.222
- State:
- Iowa
Oak township is located in Mills County, Iowa. Oak township has a 2025 population of 2,537. Oak township is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.
The average household income in Oak township is $146,654 with a poverty rate of 1.98%. The median age in Oak township is 40.9 years: 42.3 years for males, and 40.3 years for females.