West Middlesex is a borough in Mercer County, Pennsylvania, home to about 980 people across 0.8 square miles. It has no ZIP code of its own: it’s part of 16159.
Mostly Shenango Township (Mercer County); part is in West Middlesex
We’re writing up West Middlesex’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)49 miles away |
|---|---|
| Nearest city of 250,000+ | Pittsburgh, PA57 miles away |
| Nearest city of 1 million+ | Philadelphia, PA290 miles away |
Straight-line distances from the center of West Middlesex; 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 Middlesex had 818 residents in the 2020 census, down 12% since 2000.
It’s the 1778th largest of 2,568 towns in Pennsylvania by population.
Mercer County grew from 57,387 residents in 1900 to 110,652 in 2020.
Mercer County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 86°F in summer, and winter lows average 19°F. About 42 inches of rain and melted snow fall in a typical year, with about 28 inches of snow.
Source: NOAA 1991–2020 climate normals, New Castle 1 N, PA weather station (12 miles away).
40,948 jobs at 2,611 businesses in Mercer County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
6 doctors and other health care providers list an office in West Middlesex.
Nearest hospitals
Providers with an office here
| Dentists | 2 |
|---|---|
| Nurse practitioners and physician assistants | 2 |
| Mental health providers | 2 |
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 (3 nearby)
Grocery stores
Pharmacies
Libraries
Museums
Counts are within about 1 mile 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.
Public schools here are run by West Middlesex Area SD. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Luther W Low El SchWest Middlesex | K–3 | 191 | Public | 0.3 mi |
| Oakview El SchWest Middlesex | 4–6 | 171 | Public | 0.3 mi |
| West Middlesex Area JSHSWest Middlesex | 7–12 | 332 | Public | 0.2 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Shenango Township (Mercer County), Wheatland, Hermitage and Pulaski Township (Lawrence County).
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.