West Mifflin is a borough in Allegheny County, Pennsylvania, home to about 19,190 people across 14 square miles. Its ZIP codes are 15122 and 15123, and parts of 15025 are in West Mifflin too.
Homes sold for a median of $143 per square foot in the three months ending August 2026, a seller’s market.
All in West Mifflin
All in West Mifflin
Mostly Jefferson Hills; part is in West Mifflin
Each card is that ZIP code’s whole market, including any part outside West Mifflin. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up West Mifflin’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Pittsburgh International Airport (PIT)21 miles away |
|---|---|
| Nearest city of 250,000+ | Pittsburgh, PA8 miles away |
| Nearest city of 1 million+ | Philadelphia, PA251 miles away |
Straight-line distances from the center of West Mifflin; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
West Mifflin had 19,589 residents in the 2020 census, down 13% since 2000.
It’s the 110th largest of 2,568 towns in Pennsylvania by population.
Allegheny County grew from 775,058 residents in 1900 to 1,250,578 in 2020.
Allegheny County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 85°F in summer, and winter lows average 21°F. About 42.4 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Mckeesport, PA weather station (2 miles away).
709,774 jobs at 33,812 businesses in Allegheny County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
113 doctors and other health care providers list an office in West Mifflin’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 23 |
|---|---|
| Specialist doctors | 21 |
| Dentists | 8 |
| Nurse practitioners and physician assistants | 24 |
| Mental health providers | 12 |
| Physical and occupational therapists | 13 |
| Optometrists | 7 |
| Chiropractors | 5 |
| Pharmacies | 12 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (15 nearby)
Grocery stores (5 nearby)
Pharmacies (2 nearby)
Libraries (5 nearby)
Museums
Theaters and performance venues
Counts are within about 2.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Established in 1944.
Colleges and universities
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by West Mifflin Area SD. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Homeville El SchWest Mifflin | Pre-K–3 | 424 | Public | 1.9 mi |
| Clara Barton El SchWest Mifflin | K–3 | 229 | Public | 2.9 mi |
| West Mifflin Area MSWest Mifflin | 4–8 | 776 | Public | 1.3 mi |
| West Mifflin Area HSWest Mifflin | 9–12 | 964 | Public | 1.4 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Easter Seals Western and Central PaWest Mifflin | Pre-K | 41 | Nonsectarian | 3.8 mi |
| Walnut Grove Christian SchoolWest Mifflin | Pre-K–6 | 92 | Assembly of God | 2.0 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Jefferson Hills, Clairton and Pleasant Hills.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.