Upper Allen is a township in Cumberland County, Pennsylvania, home to about 23,801 people across 13 square miles. Its ZIP codes are 17027 and 17055.
Homes sold for a median of $199 per square foot across 2 ZIP codes in the three months ending August 2026, and 1 of 2 were seller’s markets.
All in Upper Allen
Mostly Upper Allen; also Lower Allen and Mechanicsburg
Each card is that ZIP code’s whole market, including any part outside Upper Allen. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Upper Allen’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)71 miles away |
|---|---|
| Closer regional airport | Harrisburg International Airport (MDT)13 miles away |
| Nearest city of 250,000+ | Baltimore, MD64 miles away |
| Nearest city of 1 million+ | Philadelphia, PA99 miles away |
Straight-line distances from the center of Upper Allen; 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.
Upper Allen had 23,183 residents in the 2020 census, up 51% since 2000.
It’s the 73rd largest of 2,568 towns in Pennsylvania by population.
Cumberland County grew from 50,344 residents in 1900 to 259,469 in 2020.
Cumberland 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 25°F. About 41.1 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Harrisburg Cptl Cy Ap, PA weather station (8 miles away).
131,167 jobs at 6,534 businesses in Cumberland County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
468 doctors and other health care providers list an office in Upper Allen’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 34 |
|---|---|
| Specialist doctors | 58 |
| Dentists | 37 |
| Nurse practitioners and physician assistants | 45 |
| Mental health providers | 207 |
| Physical and occupational therapists | 69 |
| Optometrists | 9 |
| Chiropractors | 9 |
| Pharmacies | 12 |
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 (21 nearby)
Grocery stores (2 nearby)
Pharmacies (1 nearby)
Libraries (1 nearby)
Museums (2 nearby)
Theaters and performance venues (9 nearby)
Counts are within about 2.5 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 Mechanicsburg Area SD, West Shore SD. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Kindergarten AcademyMechanicsburg | K | 321 | Public | 2.2 mi |
| Rossmoyne El SchMechanicsburg | K–4 | 417 | Public | 3.2 mi |
| Broad Street El SchMechanicsburg | 1–3 | 239 | Public | 2.2 mi |
| Northside El SchMechanicsburg | 1–3 | 221 | Public | 2.9 mi |
| Shepherdstown El SchMechanicsburg | 1–3 | 283 | Public | 0.6 mi |
| Upper Allen El SchMechanicsburg | 1–3 | 321 | Public | 0.6 mi |
| Elmwood AcademyMechanicsburg | 4–5 | 712 | Public | 2.0 mi |
| Mechanicsburg MSMechanicsburg | 6–8 | 1,112 | Public | 0.7 mi |
| Mechanicsburg Area SHSMechanicsburg | 9–12 | 1,412 | Public | 2.0 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| The Goddard SchoolMechanicsburg | K | 10 | Nonsectarian | 2.7 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 Lower Allen, Mechanicsburg, Monroe Township (Cumberland County), Fairview Township (York County) and Monaghan.
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.