Greencastle is a borough in Franklin County, Pennsylvania, home to about 4,222 people across 1.6 square miles. It has no ZIP code of its own: it’s part of 17225.
Homes sold for a median of $171 per square foot in the three months ending August 2026, a seller’s market.
Mostly Antrim; part is in Greencastle
Each card is that ZIP code’s whole market, including any part outside Greencastle. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Greencastle’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)60 miles away |
|---|---|
| Closer regional airport | Hagerstown Regional Richard A Henson Field (HGR)5 miles away |
| Nearest city of 250,000+ | Baltimore, MD69 miles away |
| Nearest city of 1 million+ | Philadelphia, PA139 miles away |
Straight-line distances from the center of Greencastle; 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.
Greencastle had 4,251 residents in the 2020 census, up 14% since 2000.
It’s the 668th 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 87°F in summer, and winter lows average 25°F. About 35.6 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Hagerstown Washington Co Ap, MD weather station (5 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).
69 doctors and other health care providers list an office in Greencastle.
Nearest hospitals
Providers with an office here
| Primary care doctors | 13 |
|---|---|
| Specialist doctors | 1 |
| Dentists | 5 |
| Nurse practitioners and physician assistants | 18 |
| Mental health providers | 13 |
| Physical and occupational therapists | 11 |
| Optometrists | 4 |
| Chiropractors | 4 |
| 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.
Grocery stores
Pharmacies (1 nearby)
Libraries
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.
Established in 1782.
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Greencastle-Antrim SD. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Greencastle-Antrim Primary SchGreencastle | K–2 | 529 | Public | 1.4 mi |
| Greencastle-Antrim El SchGreencastle | 3–5 | 671 | Public | 1.4 mi |
| Greencastle-Antrim MSGreencastle | 6–8 | 729 | Public | 1.2 mi |
| Greencastle-Antrim SHSGreencastle | 9–12 | 982 | Public | 1.3 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Antrim Mennonite SchoolGreencastle | 1–10 | 33 | Mennonite | 3.2 mi |
| Shady Grove Mennonite SchoolGreencastle | 1–10 | 156 | Mennonite | 3.5 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 Antrim, Montgomery Township (Franklin County), Peters Township and St. Thomas.
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.