Collier is a township in Allegheny County, Pennsylvania, home to about 8,972 people across 14 square miles. Its ZIP code is 15142, and parts of 15017, 15071, 15106 and 15205 are in Collier too.
Homes sold for a median of $123 per square foot in the three months ending August 2026, a buyer’s market.
Mostly Collier; also South Fayette
Mostly South Fayette; part is in Collier
Mostly North Fayette; part is in Collier
Mostly Carnegie; part is in Collier
Mostly Pittsburgh; part is in Collier
Each card is that ZIP code’s whole market, including any part outside Collier. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Collier’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)9 miles away |
|---|---|
| Nearest city of 250,000+ | Pittsburgh, PA8 miles away |
| Nearest city of 1 million+ | Philadelphia, PA265 miles away |
Straight-line distances from the center of Collier; 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.
Collier had 8,935 residents in the 2020 census, up 70% since 2000.
It’s the 306th 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 38.3 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Emsworth L/D Ohio Rvr, PA weather station (8 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).
7 doctors and other health care providers list an office in Collier.
Nearest hospitals
Providers with an office here
| Primary care doctors | 2 |
|---|---|
| Dentists | 1 |
| Nurse practitioners and physician assistants | 3 |
| Mental health providers | 1 |
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 (19 nearby)
Grocery stores (4 nearby)
Pharmacies (2 nearby)
Libraries (2 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 1875.
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
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Shares ZIP codes with Pittsburgh, Carnegie, North Fayette, South Fayette, Robinson, Crafton, Scott Township (Allegheny County), Bridgeville, Ingram, Oakdale, Green Tree, Heidelberg Borough, Cecil, Pennsbury Village, Rosslyn Farms and Thornburg.
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.