Duncannon is a borough in Perry County, Pennsylvania, home to about 1,391 people across 0.4 square miles. It has no ZIP code of its own: it’s part of 17020.
Homes sold for a median of $180 per square foot in the three months ending August 2026, a seller’s market.
Mostly Penn Township (Perry County); part is in Duncannon
Each card is that ZIP code’s whole market, including any part outside Duncannon. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Duncannon’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Baltimore/Washington International Thurgood Marshall Airport (BWI)88 miles away |
|---|---|
| Closer regional airport | Harrisburg International Airport (MDT)21 miles away |
| Nearest city of 250,000+ | Baltimore, MD80 miles away |
| Nearest city of 1 million+ | Philadelphia, PA105 miles away |
Straight-line distances from the center of Duncannon; 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.
Duncannon had 1,478 residents in the 2020 census, down 2% since 2000.
It’s the 1503rd largest of 2,568 towns in Pennsylvania by population.
Perry County grew from 26,263 residents in 1900 to 45,842 in 2020.
Perry 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 22°F. About 45.3 inches of rain and melted snow fall in a typical year, with about 24 inches of snow.
Source: NOAA 1991–2020 climate normals, Harrisburg 1 Ne, PA weather station (13 miles away).
6,058 jobs at 789 businesses in Perry County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
27 doctors and other health care providers list an office in Duncannon.
Nearest hospitals
Providers with an office here
| Primary care doctors | 4 |
|---|---|
| Nurse practitioners and physician assistants | 5 |
| Mental health providers | 3 |
| Physical and occupational therapists | 13 |
| Optometrists | 1 |
| Chiropractors | 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.
Grocery stores
Pharmacies
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 Susquenita SD. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Susquenita El SchDuncannon | K–4 | 646 | Public | 4.6 mi |
| Susquenita MSDuncannon | 5–8 | 562 | Public | 4.4 mi |
| Susquenita HSDuncannon | 9–12 | 490 | Public | 4.4 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 Penn Township (Perry County), Wheatfield, Watts, Miller Township (Perry County) and Reed.
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.