Zip Code 20155
Gainesville, Virginia — Prince William County
📍 ZIP code 20155 is in Gainesville, Prince William County, Virginia.
ZIP code 20155 is located in Gainesville, Prince William County, Virginia. It is a zip code in the Eastern (EST/EDT) Time Zone with an estimated population of 37,516. The area code for ZIP code 20155 is 202.
Quick Answer
Zip code 20155 is in Gainesville, Virginia (Prince William County). It has a population of 37,516, median household income of $154,531, and median home value of $630,400.
Population
37,516
Income
$154,531
Home Value
$630,400
Climate
88°F / 24°F
About Zip Code 20155
Zip code 20155 is located in Gainesville, Virginia, within Prince William County. Home to approximately 37,516 residents, this area sits at an elevation of 340 ft and falls within the Eastern (EST/EDT) timezone. The local area code is 202.
The median household income is $154,531 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $630,400, and the cost of living index is 206 (106% above the national average of 100).
Summers average a high of 88°F while winters drop to 24°F. The area receives about 45 in of rain and 10 in of snow annually. The zip code covers 28.9 square miles of land area and 0.9 square miles of water.
Key Statistics
37,516
$154,531
$630,400
Eastern (EST/EDT)
202
340 ft
28.9 sq mi
40.2
12,833
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Compare With Nearby Zip Codes
| Metric | 20155 | 20143 | 20169 | 20109 | 20137 | 20136 |
|---|---|---|---|---|---|---|
| City | Gainesville, VA | Catharpin, VA | Gainesville, VA | Manassas, VA | Broad Run, VA | Bristow, VA |
| Population | 37,516 | 744 | 28,696 | 44,161 | 1,734 | 31,204 |
| Median Income | $154,531 | $178,125 | $198,317 | $88,966 | $147,456 | $178,098 |
| Home Value | $630,400 | $1,022,700 | $676,600 | $411,700 | $700,000 | $585,500 |
| Cost of Living | 206 | 233 | 240 | 124 | 206 | 211 |
| Median Age | 40.2 | 38.1 | 40.6 | 33.6 | 55.2 | 37.7 |
Cost of Living
100 = National Average. Gainesville's cost of living is 106% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
4.1x
Demographics
Zip code 20155 has a population of 37,516 people with a median age of 40.2. There are 12,833 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Gainesville (20155) population trend from 2010 to 2024
↑ 133.5%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
88°F
24°F
45 in
10 in
Gainesville experiences warm summers with average highs around 88°F. Winters are cool with lows averaging 24°F. The area receives about 10 in of snow per year.
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Housing & Economy
Median Home Value
$630,400
Median Household Income
$154,531
With 12,833 housing units across 28.9 square miles, 20155 has a housing density of 444 units per square mile. The home price-to-income ratio is 4.1x.
Location & Geography
Latitude
38.8104°
Longitude
-77.6194°
Land Area
28.9 sq mi
Water Area
0.9 sq mi
Nearby Zip Codes
Zip codes closest to 20155 (Gainesville, VA) with distances:
All Zip Codes in Gainesville, VA
Other zip codes serving Gainesville:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 20155's $154,531. A way to compare Gainesville to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 20155 (Gainesville, VA). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Gainesville, Virginia?
Gainesville, Virginia uses zip code 20155 along with 1 other zip codes.
What county is zip code 20155 in?
Zip code 20155 is located in Prince William County, Virginia.
What is the population of zip code 20155?
The population of zip code 20155 is 37,516 with a median age of 40.2.
Is 20155 in Gainesville, Virginia?
Yes, zip code 20155 is in Gainesville, Prince William County, Virginia. The area code is 202.
Frequently Asked Questions
What city is zip code 20155 in?
Zip code 20155 is in Gainesville, Virginia. It is part of Prince William County and uses the Eastern (EST/EDT) timezone.
What is zip code 20155?
Zip code 20155 is a U.S. postal code in Gainesville, Virginia (Prince William County). It has a population of 37,516 and covers 28.9 square miles.
What is the population of zip code 20155?
The population of zip code 20155 (Gainesville, VA) is 37,516 with a median age of 40.2. There are approximately 12,833 housing units in this area.
What is the median income in zip code 20155?
The median household income in zip code 20155 (Gainesville, VA) is $154,531 per year. The cost of living index is 206 (100 = national average).
What is the average home price in zip code 20155?
The median home value in zip code 20155 (Gainesville, VA) is $630,400. The cost of living index is 206 compared to the national average of 100.
What county is zip code 20155 in?
Zip code 20155 is located in Prince William County, Virginia. The primary city is Gainesville.
What is the area code for zip code 20155?
Zip code 20155 in Gainesville, VA uses area code 202. It is located in the Eastern (EST/EDT) timezone.
Is zip code 20155 a good place to live?
Zip code 20155 (Gainesville, VA) has a cost of living index of 206 (100 = national average), a median household income of $154,531, and median home values of $630,400. The median age is 40.2. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 20155?
The cost of living index for zip code 20155 (Gainesville, VA) is 206, where 100 represents the national average. This area is above the national average. Median home value: $630,400.
What schools serve zip code 20155?
Zip code 20155 in Gainesville, Virginia is served by the local school district of Prince William County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.