St. Thomas is a township in Franklin County, Pennsylvania, home to about 5,956 people across 52 square miles. Its ZIP code is 17252, and parts of 17202, 17224 and 17225 are in St. Thomas too.
Homes sold for a median of $136 per square foot in the three months ending August 2026, a seller’s market.
Mostly St. Thomas; also Peters Township
Mostly Hamilton Township (Franklin County); part is in St. Thomas
Mostly Peters Township; part is in St. Thomas
Mostly Antrim; part is in St. Thomas
Each card is that ZIP code’s whole market, including any part outside St. Thomas. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up St. Thomas’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Washington Dulles International Airport (IAD)69 miles away |
|---|---|
| Closer regional airport | Hagerstown Regional Richard A Henson Field (HGR)14 miles away |
| Nearest city of 250,000+ | Baltimore, MD74 miles away |
| Nearest city of 1 million+ | Philadelphia, PA139 miles away |
Straight-line distances from the center of St. Thomas; 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.
St. Thomas had 5,917 residents in the 2020 census, up 2% since 2000.
It’s the 478th largest of 2,568 towns in Pennsylvania by population.
Franklin County grew from 54,902 residents in 1900 to 155,932 in 2020.
Franklin 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 23°F. About 43.4 inches of rain and melted snow fall in a typical year, with about 31 inches of snow.
Source: NOAA 1991–2020 climate normals, Chambersburg 1 Ese, PA weather station (7 miles away).
52,942 jobs at 3,111 businesses in Franklin County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
1 doctors and other health care providers list an office in St. Thomas.
Nearest hospitals
Providers with an office here
| Primary care doctors | 1 |
|---|---|
| Pharmacies | 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 (2 nearby)
Grocery stores (2 nearby)
Pharmacies
Libraries
Theaters and performance venues
Counts are within about 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.
Public schools here are run by Tuscarora SD. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| St Thomas El SchSaint Thomas | K–5 | 297 | Public | 2.1 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 Antrim, Hamilton Township (Franklin County), Guilford, Greene Township (Franklin County), Greencastle, Montgomery Township (Franklin County), Peters Township, Metal and Todd Township (Fulton 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.