Johnston city, Iowa
Official LSAD Designation: Johnston city • Census GEOID: 1939765
• Polk County
Johnston city is an incorporated city in Polk County, Iowa. According to official records from the Census (2025), Johnston city had an estimated population of 25,065 residents. Official Census Bureau geographic records classify this community under LSAD designation Johnston city (GEOID 1939765).
Local Government Administration U.S. Census Bureau GMAF
City Of Johnston
Municipal
Official Title:
City Clerk
Address:
PO BOX 410, JOHNSTON IA 50131-0410
County Of Polk
County
Official Title:
Central Accounting Manager
Address:
111 COURT AVE, DES MOINES IA 50309-2218
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 25,065 | 2025 |
| Median Household Income | $106,551 | 2020-2024 |
| Median Home Value | $369,100 | 2020-2024 |
| Land Area | 19.49 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).