Denver is a borough in Lancaster County, Pennsylvania, home to about 3,771 people across 1.3 square miles. Its ZIP code is 17517.
Homes sold for a median of $204 per square foot in the three months ending August 2026, a seller’s market.
Mostly Denver; also West Cocalico and East Cocalico
Each card is that ZIP code’s whole market, including any part outside Denver. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | Philadelphia International Airport (PHL)52 miles away |
|---|---|
| Closer regional airport | Lancaster Airport (LNS)12 miles away |
| Nearest city of 250,000+ | Philadelphia, PA54 miles away |
Straight-line distances from the center of Denver; 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.
Denver had 3,792 residents in the 2020 census, up 14% since 2000.
It’s the 758th largest of 2,568 towns in Pennsylvania by population.
Lancaster County grew from 159,241 residents in 1900 to 552,984 in 2020.
Lancaster County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 86°F in summer, and winter lows average 22°F. About 42 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Lancaster Ap, PA weather station (12 miles away).
249,379 jobs at 13,776 businesses in Lancaster County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
38 doctors and other health care providers list an office in Denver.
Nearest hospitals
Providers with an office here
| Primary care doctors | 2 |
|---|---|
| Specialist doctors | 1 |
| Dentists | 3 |
| Nurse practitioners and physician assistants | 1 |
| Mental health providers | 17 |
| Physical and occupational therapists | 10 |
| Chiropractors | 4 |
| Pharmacies | 5 |
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
Libraries
Museums
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 1863.
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Eastern Lancaster County SD, Cocalico SD. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Brecknock El SchDenver | K–6 | 441 | Public | 4.9 mi |
| Denver El SchDenver | K–5 | 460 | Public | 1.6 mi |
| Cocalico MSDenver | 6–8 | 617 | Public | 1.7 mi |
| Cocalico SHSDenver | 9–12 | 991 | Public | 2.1 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Gehmans Mennonite SchoolDenver | K–8 | 179 | Mennonite | 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 West Cocalico, East Cocalico, Brecknock Township (Lancaster County) and Clay Township (Lancaster 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.