Monongahela city, Pennsylvania
Official LSAD Designation: Monongahela city • Census GEOID: 4250408
• Washington County
Monongahela city is an incorporated city in Washington County, Pennsylvania. According to official records from the Census (2025), Monongahela city had an estimated population of 4,041 residents. Official Census Bureau geographic records classify this community under LSAD designation Monongahela city (GEOID 4250408).
Local Government Administration U.S. Census Bureau GMAF
City Of Monongahela
Municipal
Official Title:
Mayor
Address:
449 W MAIN ST, MONONGAHELA PA 15063-2559
County Of Washington
County
Official Title:
Chairman
Address:
100 W BEAU ST, STE 702, WASHINGTON PA 15301-4443
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 4,041 | 2025 |
| Median Household Income | $59,861 | 2020-2024 |
| Median Home Value | $114,300 | 2020-2024 |
| Land Area | 1.91 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).