
Ottumwa
- County:
- Wapello County
- County Seat:
- Yes
- Area (mi²):
- 16.064
- State:
- Iowa
Ottumwa is a city located in Wapello County, Iowa. Ottumwa has a 2025 population of 25,116. It is also the county seat of Wapello County. Ottumwa is currently declining at a rate of -0.27% annually and its population has decreased by -1.33% since the most recent census, which recorded a population of 25,455 in 2020.
The average household income in Ottumwa is $75,925 with a poverty rate of 18.87%. The median age in Ottumwa is 37.4 years: 35 years for males, and 40.4 years for females.