Tredyffrin is a township in Chester County, Pennsylvania, home to about 31,922 people across 20 square miles. Its ZIP code is 19301, and parts of 19087, 19312, 19333 and 19355 are in Tredyffrin too.
Homes sold for a median of $344 per square foot in the three months ending August 2026, a seller’s market.
Mostly Tredyffrin; also Willistown and Easttown
Mostly Radnor; part is in Tredyffrin
Mostly Easttown; part is in Tredyffrin
Mostly Easttown; part is in Tredyffrin
Mostly East Whiteland; part is in Tredyffrin
Each card is that ZIP code’s whole market, including any part outside Tredyffrin. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Tredyffrin’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Philadelphia International Airport (PHL)17 miles away |
|---|---|
| Nearest city of 250,000+ | Philadelphia, PA17 miles away |
Straight-line distances from the center of Tredyffrin; 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.
Tredyffrin had 31,927 residents in the 2020 census, up 10% since 2000.
It’s the 41st largest of 2,568 towns in Pennsylvania by population.
Chester County grew from 95,695 residents in 1900 to 534,413 in 2020.
Chester County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 88°F in summer, and winter lows average 23°F. About 45.3 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Phoenixville 1 E, PA weather station (5 miles away).
262,454 jobs at 15,102 businesses in Chester County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
751 doctors and other health care providers list an office in Tredyffrin.
Nearest hospitals
Providers with an office here
| Primary care doctors | 82 |
|---|---|
| Specialist doctors | 176 |
| Dentists | 43 |
| Nurse practitioners and physician assistants | 165 |
| Mental health providers | 226 |
| Physical and occupational therapists | 43 |
| Optometrists | 8 |
| Chiropractors | 8 |
| Pharmacies | 6 |
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 (27 nearby)
Grocery stores (7 nearby)
Pharmacies (1 nearby)
Libraries (4 nearby)
Museums (3 nearby)
Theaters and performance venues (2 nearby)
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.
Established in 1707.
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Good Samaritan Day SchoolPaoli | Pre-K–K | 29 | Episcopal | 2.0 mi |
| St Norbert Elementary SchoolPaoli | Pre-K–8 | 194 | Roman Catholic | 1.3 mi |
| Delaware Valley Friends SchoolPaoli | 1–12 | 207 | Friends (Quaker) | 1.5 mi |
| Royer-Greaves School for BlindPaoli | 3–12 | 19 | Nonsectarian | 1.8 mi |
Source: U.S. Department of Education, NCES: Common Core of Data 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 East Whiteland, Radnor, Easttown, Willistown, Upper Merion, Charlestown, Malvern, East Goshen and Newtown Township (Delaware 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.