South New Castle is a borough in Lawrence County, Pennsylvania, home to about 712 people across 0.3 square miles. It has no ZIP code of its own: it’s part of 16102.
Homes sold for a median of $84 per square foot in the three months ending August 2026, a seller’s market.
Mostly New Castle; part is in South New Castle
Each card is that ZIP code’s whole market, including any part outside South New Castle. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up South New Castle’s story and what everyday life there is like, for people thinking about moving in.
Are you a local agent who knows South New Castle well? Agents who advertise here will be able to write the guide. Advertise on OfferBacked
| Nearest major airport | Pittsburgh International Airport (PIT)34 miles away |
|---|---|
| Nearest city of 250,000+ | Pittsburgh, PA42 miles away |
| Nearest city of 1 million+ | Philadelphia, PA284 miles away |
Straight-line distances from the center of South New Castle; 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.
South New Castle had 647 residents in the 2020 census, down 20% since 2000.
It’s the 1984th 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 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 (4 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).
10 doctors and other health care providers list an office in South New Castle.
Nearest hospitals
Providers with an office here
| Specialist doctors | 1 |
|---|---|
| Dentists | 1 |
| Mental health providers | 3 |
| Physical and occupational therapists | 1 |
| Optometrists | 2 |
| Chiropractors | 2 |
| Pharmacies | 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 (4 nearby)
Grocery stores
Pharmacies
Libraries
Theaters and performance venues
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 Mohawk Area SD. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Mohawk El SchNew Castle | K–5 | 709 | Public | 3.2 mi |
| Mohawk JHSNew Castle | 6–8 | 329 | Public | 3.3 mi |
| Mohawk SHSNew Castle | 9–12 | 406 | Public | 3.3 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 New Castle, North Beaver and Taylor 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.