20151 ZIP Code — Chantilly, VA

Fairfax County, Virginia

ZIP code 20151 is located in Chantilly, Virginia, within Fairfax County. It covers approximately 15.86 square miles and serves a population of 21,893 residents. This is a po box ZIP code in the Eastern (ET) timezone, served by area code 703/571.

About ZIP code 20151

The housing stock consists of a mix of housing types. Most homes were built in the 1980s, giving the area an established character. Median home value is $628,900. Owner-occupancy is high at 80%, well above the national average.

The gap between median ($137,483) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 4% is below the national average.

The dominant occupation class is management, business, and professional, with professional and management as the leading industry. The average commute of 31 minutes is near the national average.

Educational attainment is high — 59% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Notable community characteristics include Spanish spoken in 23% of households.

Overall, ZIP code 20151 reflects a community defined by a highly educated population and high homeownership.

21,893

population

15.86

sq mi land

PO Box

ZIP type

Eastern (ET)

timezone

20151 ZIP code map

Cities in ZIP code 20151

Below are the cities the US Postal Service accepts for ZIP code 20151. Using any city not on this list may result in mail delivery delays.

City	Status
Chantilly	Acceptable
Chantilly	Preferred

Nearby ZIP codes

20120 Centreville (2 mi) 20152 Chantilly (3.2 mi) 22033 Fairfax (4 mi) 20171 Herndon (4.3 mi) 20102 Dulles (4.7 mi) 20121 Centreville (4.9 mi) 22036 Fairfax (5.9 mi) 20191 Reston (6.2 mi) 20192 Herndon (6.2 mi) 22124 Oakton (6.6 mi) 20143 Catharpin (6.7 mi) 22095 Herndon (6.7 mi)

Demographics updated 05/2026

Population
Total population	21,893
Population density	1,380 / sq mi
State FIPS	51
County FIPS	059

Geography
Land area	15.86 sq mi
Water area	0.13 sq mi
Latitude	38.8862
Longitude	-77.4510
Timezone	Eastern (ET)
Area code	703/571

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	12.7%	16.6%	32.9%
$50k – $100k	24.6%	22.2%	29.2%
$100k – $200k	33.9%	34.9%	26.3%
Over $200k	28.8%	26.4%	11.6%

Demographics & statistics

21,893

Population

1,380

People per sq mi

40.8

Median age

$137,483

Median household income

$56,218

Per capita income

$628,900

Median home value

$2,030

Median monthly rent

80.1%

Home ownership

4.1%

Poverty rate

3.2%

Unemployment

5,509

Housing units

59.0%

Bachelor's or higher

Age distribution

Male Female

516

Under 5

514

638

5–9

636

878

10–14

875

924

15–19

922

773

20–24

771

965

25–34

962

1,590

35–44

1,586

1,820

45–54

1,815

758

55–59

755

722

60–64

720

915

65–74

912

418

75–84

417

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	5,251	24.0%
18 and over	16,642	76.0%
65 and over	2,753	12.6%
Median age	40.8 years

Race & ethnicity

White 38.7%

Asian 35.9%

Hispanic or Latino 9.9%

Two or more races 7.5%

Other race 4.6%

Black or African American 3.3%

Group	Count	%
White	9,415	38.7%
Asian	8,732	35.9%
Hispanic or Latino	2,416	9.9%
Two or more races	1,825	7.5%
Other race	1,127	4.6%
Black or African American	794	3.3%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	12.7%	16.6%	32.9%
$50k – $100k	24.6%	22.2%	29.2%
$100k – $200k	33.9%	34.9%	26.3%
Over $200k	28.8%	26.4%	11.6%

Under $10k 1.3%

$10k–$15k 0.7%

$15k–$25k 3.5%

$25k–$35k 1.8%

$35k–$50k 5.6%

$50k–$75k 9.0%

$75k–$100k 12.1%

$100k–$150k 19.5%

$150k–$200k 13.1%

$200k+ 33.3%

Range	% of households
Under $10k	1.3%
$10k–$15k	0.7%
$15k–$25k	3.5%
$25k–$35k	1.8%
$35k–$50k	5.6%
$50k–$75k	9.0%
$75k–$100k	12.1%
$100k–$150k	19.5%
$150k–$200k	13.1%
$200k+	33.3%
Median income	$137,483

Housing

Home values

Under $50k 1.7%

$50k–$100k 3.9%

$100k–$150k 1.0%

$150k–$200k 0.1%

$200k–$300k 3.4%

$300k–$500k 19.6%

$500k–$1M 64.3%

$1M+ 5.9%

Housing overview

Metric	Value
Median home value	$628,900
Median rent / month	$2,030
Owner occupied	80.1%
Renter occupied	19.9%
Vacant	0.8%
Single-family detached	64.0%
Large apartment buildings	3.9%
Mobile homes	4.8%
Median rooms	7.6
Avg household size (owned)	3.11

Year built

Era	%
2020 or later	2.5%
2010–2019	3.2%
2000–2009	16.0%
1990–1999	15.9%
1980–1989	39.5%
1970–1979	12.2%
1960–1969	8.6%
1950–1959	0.3%
1940–1949	1.0%
1939 or earlier	0.8%

Bedrooms

Size	% of units
No bedroom (studio)	0.6%
1 bedroom	2.1%
2 bedrooms	13.9%
3 bedrooms	27.5%
4 bedrooms	42.3%
5+ bedrooms	13.6%

Vehicles per household

Vehicles	% of households
No vehicle	4.1%
1 vehicle	20.6%
2 vehicles	44.5%
3 or more	30.8%

Heating fuel

Fuel type	%
Utility gas	50.6%
Electricity	46.7%
Propane / LP gas	2.0%
Fuel oil	0.6%

Households & families

Household type	Count	%
Married-couple family	4,683	68.8%
Cohabiting couple	218	3.2%
Male householder, no spouse	680	10.0%
Female householder, no spouse	1,226	18.0%
Households with children under 18	2,843	41.8%
Households with seniors (65+)	1,802	26.5%
Average household size	3.21

Marital status

Status	Male	Female
Never married	33.4%	27.8%
Married	60.9%	57.9%
Separated	0.5%	1.7%
Widowed	1.3%	5.2%
Divorced	3.9%	7.3%

Education

Less than 9th grade 3.9%

Some HS, no diploma 4.0%

HS graduate 16.3%

Some college, no degree 10.5%

Associate's degree 6.2%

Bachelor's degree 32.1%

Graduate / professional 26.9%

Metric	%
HS diploma or higher	92.0%
Bachelor's or higher	59.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	339	5.4%
Kindergarten	269	4.3%
Elementary school	2,406	38.5%
High school	1,465	23.4%
College / grad school	1,771	28.3%

Employment

Industry of employment

Professional & management 26.9%

Education & healthcare 16.1%

Arts, food & hospitality 10.4%

Public administration 9.4%

Retail trade 7.9%

Finance & real estate 7.5%

Other services 5.8%

Construction 5.0%

Manufacturing 4.9%

Transportation & utilities 3.2%

Information 2.3%

Wholesale trade 0.6%

Agriculture & mining 0.1%

Occupation

Category	%
Management, business & arts	54.7%
Service	17.8%
Sales & office	16.2%
Natural resources & construction	5.2%
Production & transportation	6.1%

Employment type

Type	%
Private sector	76.0%
Government	19.4%
Self-employed	4.4%
Unpaid family workers	0.2%

Commute

Method	%
Drive alone	61.4%
Carpool	13.6%
Public transit	3.4%
Walk	2.6%
Work from home	16.1%
Other means	2.9%
Avg commute (minutes)	30.6

Poverty

All people 4.1%

Under 18 years 6.9%

18 and over 3.2%

Married-couple families 1.7%

Female-led households 10.9%

Income support

Source	% of households
Social Security	22.8%
Retirement income	19.6%
Supplemental Security	3.2%
Cash public assistance	1.2%
Food stamps / SNAP	4.3%

Health indicators

Condition	%
Obesity	22.1%
High blood pressure	25.6%
High cholesterol	29.8%
Diabetes	7.9%
Heart disease	3.6%
Stroke	1.8%
Asthma	7.8%
Arthritis	17.5%
Kidney disease	1.9%
Pulmonary disease	3.6%
Cancer	4.7%

Behavior / access	%
Smoking	10.5%
Binge drinking	15.9%
No physical activity	16.4%
Less than 7 hrs sleep	32.5%
Depression	15.7%
Fair or poor health	9.5%
Poor mental health	11.2%
Poor physical health	6.5%
No health insurance	11.6%
Visited doctor (checkup)	71.7%
Visited dentist	73.3%
Cholesterol screening	91.4%
Teeth loss	6.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	798	4.8%

Disability	%
Any disability	6.7%
Under 18	2.1%
18–64 years	5.4%
65 and over	22.3%

Health insurance coverage

Type	%
Private insurance	80.3%
Public insurance	21.1%
No insurance	10.1%
Uninsured under 19	7.4%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	20,863	95.3%
Spanish	4,738	22.7%
Other Indo-European	1,711	8.2%
Asian & Pacific Islander	1,152	5.5%
Other languages	1,791	8.6%

Place of birth & citizenship

Origin	Count	%
Native born (US)	12,269	56.0%
Born in same state	11,866	54.2%
Born in different state	5,954	27.2%
Foreign born	403	1.8%
Naturalized citizen	9,624	44.0%
Not a US citizen	5,896	61.3%

Ancestry

Ancestry	Count	%
French	1,569	7.2%
Italian	1,463	6.7%
Arab	849	3.9%
Polish	111	0.5%

Ancestry	Count	%
Irish	109	0.5%
Dutch	82	0.4%
German	64	0.3%
English	15	0.1%

Technology access

Metric	% of households
Computer access	31.1%
Internet access	99.5%

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

Frequently asked questions about ZIP code 20151

What city is ZIP code 20151 in?

ZIP code 20151 is primarily assigned to Chantilly, Virginia.

What county is ZIP code 20151 in?

ZIP code 20151 falls within Fairfax County, Virginia.

How educated is the population of ZIP code 20151?

59% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

Is Spanish widely spoken in ZIP code 20151?

Approximately 23% of households in ZIP code 20151 speak Spanish as a primary language.

Is ZIP code 20151 mostly owner-occupied?

80% of occupied units in ZIP code 20151 are owner-occupied, well above the national average.

What is the median household income in ZIP code 20151?

The median household income in ZIP code 20151 is $137,483, above the national median of ~$75,000.

What timezone is ZIP code 20151 in?

ZIP code 20151 observes the EST timezone.