Plain Grove is a township in Lawrence County, Pennsylvania, home to about 751 people across 17 square miles. It has no ZIP code of its own: it’s part of 16057 and 16156.
Homes sold for a median of $181 per square foot across 2 ZIP codes in the three months ending August 2026, and 1 of 2 were seller’s markets.
Mostly Slippery Rock Township (Butler County); part is in Plain Grove
Mostly Wilmington Township (Lawrence County); part is in Plain Grove
Each card is that ZIP code’s whole market, including any part outside Plain Grove. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Plain Grove’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)41 miles away |
|---|---|
| Nearest city of 250,000+ | Pittsburgh, PA46 miles away |
| Nearest city of 1 million+ | Philadelphia, PA276 miles away |
Straight-line distances from the center of Plain Grove; 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.
Plain Grove had 777 residents in the 2020 census, down 9% since 2000.
It’s the 1958th largest of 2,568 towns in Pennsylvania by population.
Lawrence County grew from 57,042 residents in 1900 to 86,070 in 2020.
Lawrence County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 81°F in summer, and winter lows average 17°F. About 45.3 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Slippery Rock 1 Ssw, PA weather station (8 miles away).
24,349 jobs at 1,865 businesses in Lawrence County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
60 doctors and other health care providers list an office in Plain Grove’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 8 |
|---|---|
| Specialist doctors | 1 |
| Dentists | 11 |
| Nurse practitioners and physician assistants | 17 |
| Mental health providers | 12 |
| Physical and occupational therapists | 8 |
| Chiropractors | 3 |
| Pharmacies | 3 |
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.
Museums
Counts are within about 3 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.
Public schools here are run by Slippery Rock Area SD. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Slippery Rock Area El SchSlippery Rock | K–5 | 453 | Public | 7.2 mi |
| Slippery Rock Area MSSlippery Rock | 6–8 | 404 | Public | 8.4 mi |
| Slippery Rock Area HSSlippery Rock | 9–12 | 627 | Public | 8.3 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Fayette SchoolVolant | 1–8 | 27 | Amish | 5.7 mi |
| Lusk SchoolVolant | 1–8 | 36 | Amish | 4.7 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 Slippery Rock Township (Butler County), Slippery Rock Borough, Wilmington Township (Lawrence County), Brady Township (Butler County), Worth Township (Butler County), Springfield Township (Mercer County), Scott Township (Lawrence County), Washington Township (Lawrence County), Hickory, West Liberty, Mercer Township, Cherry Township (Butler County) and Volant.
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.