Monmouth city, Oregon
Official LSAD Designation: Monmouth city • Census GEOID: 4149550
• Polk County
Monmouth city is an incorporated city in Polk County, Oregon. According to official records from the Census (2025), Monmouth city had an estimated population of 11,543 residents. Official Census Bureau geographic records classify this community under LSAD designation Monmouth city (GEOID 4149550).
Local Government Administration U.S. Census Bureau GMAF
Town Of Monmouth
Municipal
Official Title:
Mayor
Address:
151 MAIN ST W, MONMOUTH OR 97361-2199
County Of Polk
County
Official Title:
Admin Officer
Address:
850 MAIN ST, DALLAS OR 97338-3147
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 11,543 | 2025 |
| Median Household Income | $69,170 | 2020-2024 |
| Median Home Value | $413,200 | 2020-2024 |
| Land Area | 2.24 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).