Gainesville is a community in Prince William County, Virginia, home to about 18,196 people across 10 square miles. Its ZIP code is 20155, and parts of 20169 are in Gainesville too.
Homes sold for a median of $252 per square foot in the three months ending August 2026, a seller’s market.
Mostly Gainesville; also Linton Hall
Part is in Gainesville, part in Bull Run Mountain Estates and Haymarket
Each card is that ZIP code’s whole market, including any part outside Gainesville. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Gainesville’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)12 miles away |
|---|---|
| Nearest city of 250,000+ | Washington, DC33 miles away |
| Nearest city of 1 million+ | Philadelphia, PA156 miles away |
Straight-line distances from the center of Gainesville; 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.
Gainesville had 18,112 residents in the 2020 census, up 313% since 2000.
It’s the 74th largest of 669 towns in Virginia by population.
Prince William County grew from 11,112 residents in 1900 to 482,204 in 2020.
Prince William 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 43.2 inches of rain and melted snow fall in a typical year, with about 21 inches of snow.
Source: NOAA 1991–2020 climate normals, Washington Dc Dulles Ap, VA weather station (12 miles away).
120,091 jobs at 9,286 businesses in Prince William County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
418 doctors and other health care providers list an office in Gainesville.
Nearest hospitals
Providers with an office here
| Primary care doctors | 37 |
|---|---|
| Specialist doctors | 28 |
| Dentists | 72 |
| Nurse practitioners and physician assistants | 70 |
| Mental health providers | 118 |
| Physical and occupational therapists | 75 |
| Optometrists | 6 |
| Chiropractors | 12 |
| 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 (3 nearby)
Grocery stores (5 nearby)
Pharmacies (3 nearby)
Libraries (1 nearby)
Museums (1 nearby)
Theaters and performance venues
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 Prince William County Public Schools. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Buckland Mills ElementaryGainesville | Pre-K–5 | 735 | Public | 2.1 mi |
| George G. Tyler ElementaryGainesville | Pre-K–5 | 490 | Public | 1.5 mi |
| Glenkirk ElementaryGainesville | Pre-K–5 | 554 | Public | 4.1 mi |
| Bull Run MiddleGainesville | 6–8 | 1,129 | Public | 1.2 mi |
| Gainesville MiddleGainesville | 6–8 | 1,403 | Public | 3.5 mi |
| Gainesville HighGainesville | 9–12 | 2,648 | Public | 3.5 mi |
| Pace WestGainesville | — | — | Special Education | 1.6 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Winwood Childrens CenterGainesville | Pre-K–K | 11 | Nonsectarian | 3.1 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 Linton Hall, Bull Run Mountain Estates and Haymarket.
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.