20155 ZIP Code — Gainesville, VA

Prince William County, Virginia

ZIP code 20155 is located in Gainesville, Virginia, within Prince William County. It covers approximately 25.48 square miles and serves a population of 37,106 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 571/703.

About ZIP code 20155

The housing stock consists of a mix of housing types. Most homes were built in the 2000s, giving the area an established character. Median home value is $593,600. Owner-occupancy is high at 85%, well above the national average.

Median household income is $147,295. The poverty rate of 3% is below the national average.

The dominant occupation class is management, business, and professional, with professional and management as the leading industry. An above-average commute of 37 minutes suggests many residents work outside the immediate area.

Educational attainment is high — 55% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Notable community characteristics include a notable veteran presence at 12% of civilians, above the national average of 7%.

Overall, ZIP code 20155 reflects a community defined by a highly educated population, a strong veteran community, and high homeownership.

37,106

population

25.48

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

20155 ZIP code map

Cities in ZIP code 20155

Below are the cities the US Postal Service accepts for ZIP code 20155. Using any city not on this list may result in mail delivery delays.

City	Status
Gainesville	Preferred

Nearby ZIP codes

20169 Haymarket (3.9 mi) 20143 Catharpin (4.4 mi) 20137 Broad Run (4.9 mi) 20109 Manassas (5.4 mi) 20136 Bristow (7.1 mi) 20198 The Plains (7.7 mi) 20187 Warrenton (8.5 mi) 20152 Chantilly (8.6 mi) 20110 Manassas (9.1 mi) 20181 Nokesville (9.1 mi) 20121 Centreville (9.3 mi) 20120 Centreville (9.6 mi)

Demographics updated 05/2026

Population
Total population	37,106
Population density	1,456 / sq mi
State FIPS	51
County FIPS	153

Geography
Land area	25.48 sq mi
Water area	0.88 sq mi
Latitude	38.8133
Longitude	-77.6339
Timezone	Eastern (ET)
Area code	571/703

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	12.5%	17.8%	32.9%
$50k – $100k	23.3%	28.3%	29.2%
$100k – $200k	41.5%	36.3%	26.3%
Over $200k	22.7%	17.5%	11.6%

Demographics & statistics

37,106

Population

1,456

People per sq mi

38.9

Median age

$147,295

Median household income

$55,607

Per capita income

$593,600

Median home value

$2,571

Median monthly rent

85.4%

Home ownership

3.4%

Poverty rate

3.0%

Unemployment

10,782

Housing units

54.7%

Bachelor's or higher

Age distribution

Male Female

1,363

Under 5

1,323

1,117

5–9

1,085

1,519

10–14

1,474

1,608

15–19

1,562

1,053

20–24

1,022

1,749

25–34

1,699

2,810

35–44

2,728

2,488

45–54

2,416

1,174

55–59

1,140

1,016

60–64

987

1,530

65–74

1,486

1,078

75–84

1,046

321

85+

312

← Male

Female →

Age summary

Group	Count	%
Under 18	9,862	26.6%
18 and over	27,244	73.4%
65 and over	5,773	15.6%
Median age	38.9 years

Race & ethnicity

White 55.7%

Asian 11.7%

Black or African American 11.6%

Two or more races 9.8%

Hispanic or Latino 7.9%

Other race 3.1%

American Indian / Alaska Native 0.3%

Group	Count	%
White	22,441	55.7%
Asian	4,695	11.7%
Black or African American	4,665	11.6%
Two or more races	3,928	9.8%
Hispanic or Latino	3,168	7.9%
Other race	1,259	3.1%
American Indian / Alaska Native	102	0.3%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	12.5%	17.8%	32.9%
$50k – $100k	23.3%	28.3%	29.2%
$100k – $200k	41.5%	36.3%	26.3%
Over $200k	22.7%	17.5%	11.6%

Under $10k 2.4%

$10k–$15k 1.1%

$15k–$25k 1.1%

$25k–$35k 1.6%

$35k–$50k 4.6%

$50k–$75k 8.5%

$75k–$100k 8.9%

$100k–$150k 23.4%

$150k–$200k 20.1%

$200k+ 28.4%

Range	% of households
Under $10k	2.4%
$10k–$15k	1.1%
$15k–$25k	1.1%
$25k–$35k	1.6%
$35k–$50k	4.6%
$50k–$75k	8.5%
$75k–$100k	8.9%
$100k–$150k	23.4%
$150k–$200k	20.1%
$200k+	28.4%
Median income	$147,295

Housing

Home values

Under $50k 1.6%

$50k–$100k 0.4%

$100k–$150k 0.1%

$150k–$200k 0.4%

$200k–$300k 2.1%

$300k–$500k 27.7%

$500k–$1M 62.1%

$1M+ 5.7%

Housing overview

Metric	Value
Median home value	$593,600
Median rent / month	$2,571
Owner occupied	85.4%
Renter occupied	14.6%
Vacant	2.4%
Single-family detached	66.8%
Large apartment buildings	3.6%
Mobile homes	0.5%
Median rooms	8.1
Avg household size (owned)	2.97

Year built

Era	%
2020 or later	0.4%
2010–2019	18.0%
2000–2009	56.0%
1990–1999	14.5%
1980–1989	6.7%
1970–1979	1.7%
1960–1969	1.4%
1950–1959	0.3%
1940–1949	0.1%
1939 or earlier	1.0%

Bedrooms

Size	% of units
No bedroom (studio)	0.6%
1 bedroom	2.0%
2 bedrooms	8.5%
3 bedrooms	34.2%
4 bedrooms	39.1%
5+ bedrooms	15.5%

Vehicles per household

Vehicles	% of households
No vehicle	2.3%
1 vehicle	21.0%
2 vehicles	49.3%
3 or more	27.5%

Heating fuel

Fuel type	%
Utility gas	76.0%
Electricity	19.6%
Propane / LP gas	2.6%
Fuel oil	0.6%
Wood	0.7%
No fuel used	0.6%

Households & families

Household type	Count	%
Married-couple family	8,474	69.0%
Cohabiting couple	228	1.9%
Male householder, no spouse	1,295	10.5%
Female householder, no spouse	2,281	18.6%
Households with children under 18	5,252	42.8%
Households with seniors (65+)	3,814	31.1%
Average household size	3.01

Marital status

Status	Male	Female
Never married	30.5%	21.5%
Married	60.2%	59.7%
Separated	1.6%	1.8%
Widowed	2.5%	8.0%
Divorced	5.3%	9.0%

Education

Less than 9th grade 1.8%

Some HS, no diploma 1.9%

HS graduate 15.7%

Some college, no degree 17.7%

Associate's degree 8.1%

Bachelor's degree 32.5%

Graduate / professional 22.2%

Metric	%
HS diploma or higher	96.3%
Bachelor's or higher	54.7%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	582	5.9%
Kindergarten	344	3.5%
Elementary school	4,023	40.5%
High school	2,529	25.4%
College / grad school	2,460	24.8%

Employment

Industry of employment

Professional & management 25.6%

Education & healthcare 18.9%

Public administration 10.2%

Arts, food & hospitality 8.5%

Retail trade 8.0%

Construction 7.3%

Finance & real estate 5.8%

Transportation & utilities 5.2%

Other services 3.6%

Manufacturing 3.0%

Information 2.7%

Wholesale trade 0.8%

Agriculture & mining 0.4%

Occupation

Category	%
Management, business & arts	54.1%
Service	14.7%
Sales & office	19.2%
Natural resources & construction	5.2%
Production & transportation	6.8%

Employment type

Type	%
Private sector	73.6%
Government	20.6%
Self-employed	5.5%
Unpaid family workers	0.3%

Commute

Method	%
Drive alone	68.0%
Carpool	8.0%
Public transit	2.1%
Walk	0.9%
Work from home	19.8%
Other means	1.2%
Avg commute (minutes)	37.2

Poverty

All people 3.4%

Under 18 years 2.8%

18 and over 3.6%

Married-couple families 1.3%

Female-led households 11.4%

Income support

Source	% of households
Social Security	28.2%
Retirement income	29.9%
Supplemental Security	3.4%
Cash public assistance	1.2%
Food stamps / SNAP	2.5%

Health indicators

Condition	%
Obesity	31.1%
High blood pressure	28.4%
High cholesterol	29.4%
Diabetes	8.3%
Heart disease	4.2%
Stroke	1.9%
Asthma	8.2%
Arthritis	19.8%
Kidney disease	2.1%
Pulmonary disease	3.9%
Cancer	5.9%

Behavior / access	%
Smoking	11.2%
Binge drinking	15.4%
No physical activity	15.5%
Less than 7 hrs sleep	32.1%
Depression	16.5%
Fair or poor health	8.9%
Poor mental health	11.7%
Poor physical health	6.6%
No health insurance	10.1%
Visited doctor (checkup)	76.6%
Visited dentist	76.3%
Cholesterol screening	92.5%
Teeth loss	6.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	3,179	11.7%

Disability	%
Any disability	8.1%
Under 18	2.4%
18–64 years	5.4%
65 and over	28.1%

Health insurance coverage

Type	%
Private insurance	87.1%
Public insurance	21.0%
No insurance	5.7%
Uninsured under 19	5.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	34,420	92.8%
Spanish	2,943	8.6%
Other Indo-European	1,001	2.9%
Asian & Pacific Islander	545	1.6%
Other languages	1,000	2.9%

Place of birth & citizenship

Origin	Count	%
Native born (US)	29,854	80.5%
Born in same state	28,884	77.8%
Born in different state	14,046	37.9%
Foreign born	970	2.6%
Naturalized citizen	7,252	19.5%
Not a US citizen	5,154	71.1%

Ancestry

Ancestry	Count	%
French	3,981	10.7%
Italian	3,937	10.6%
Arab	1,648	4.4%
Polish	219	0.6%
Norwegian	165	0.4%

Ancestry	Count	%
English	156	0.4%
German	120	0.3%
Irish	83	0.2%
Dutch	19	0.1%

Technology access

Metric	% of households
Computer access	33.1%
Internet access	97.4%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 20155

What city is ZIP code 20155 in?

ZIP code 20155 is primarily assigned to Gainesville, Virginia.

What county is ZIP code 20155 in?

ZIP code 20155 falls within Prince William County, Virginia.

How educated is the population of ZIP code 20155?

55% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

Is ZIP code 20155 mostly owner-occupied?

85% of occupied units in ZIP code 20155 are owner-occupied, well above the national average.

Does ZIP code 20155 have a large veteran population?

12% of civilians in ZIP code 20155 are veterans, above the national average of ~7%.

What is the median household income in ZIP code 20155?

The median household income in ZIP code 20155 is $147,295, above the national median of ~$75,000.

What timezone is ZIP code 20155 in?

ZIP code 20155 observes the EST timezone.