
Sumner township
- County:
- Bremer County
- County Seat:
- No
- Area (mi²):
- 35.562
- State:
- Iowa
Sumner township is located in Bremer County, Iowa. Sumner township has a 2025 population of 363. Sumner 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 Sumner township is $131,283 with a poverty rate of 4.68%. The median age in Sumner township is 27.5 years: 27.8 years for males, and 24.8 years for females.