| Place Name | Ottumwa |
| Place Type | City |
| ZIP Code(s) | 52501 |
| County | Wapello County |
| Area Code(s) | 641 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 24,849 |
| Population Growth Rate (2010-19) | 2.02% |
| Majority Ethnicity | White 77.76% |
| Metro/Micro Stats Area | Ottumwa, IA |
| US Congressional District(s) | Iowa 2nd |
| State House Districts | 81 |
| State Senate Districts | 41 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 77.76% |
| African American | 4.47% |
| Hispanic | 0.37% |
| Asian | 1.75% |
| Native American | 1.55% |
| Hawaiin/Pacific Islander | 14.09% |