Onawa city, Iowa
Official LSAD Designation: Onawa city • Census GEOID: 1959115
• Monona County
Onawa city is an incorporated city in Monona County, Iowa. According to official records from the Census (2025), Onawa city had an estimated population of 2,821 residents. Official Census Bureau geographic records classify this community under LSAD designation Onawa city (GEOID 1959115).
Local Government Administration U.S. Census Bureau GMAF
City Of Onawa
Municipal
Official Title:
City Clerk
Address:
914 DIAMOND ST, ONAWA IA 51040-1624
County Of Monona
County
Official Title:
Monona County Auditor
Address:
610 IOWA AVE, ONAWA IA 51040-1671
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 2,821 | 2025 |
| Median Household Income | $62,143 | 2020-2024 |
| Median Home Value | $145,800 | 2020-2024 |
| Land Area | 5.27 sq mi | Gazetteer (2026) |
| Civic & Public Services | Hospitals, Libraries, Colleges | CMS / IMLS / IPEDS |
| Schools & Districts | NCES Directory Listings | Provided by k12guides.com |
| Nearby Airports | Landing Facilities | Provided by airport-data.com |
| Climate & Weather | NOAA 30-Year Normals | 1991–2020 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).