What city is 20151 in?

20151 is a Chantilly, VA mailing address. By land area, 73% lies inside Chantilly and 2% lies inside Sully Square; the rest is outside any Census-defined city or community.

What is the population of 20151?

About 22,610 people (±1,387), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 22,653.

What is the median household income in 20151?

$158,271 (±$11,415), compared with $93,170 for Virginia as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 20151?

22 USPS carrier routes with 9,134 residential and 2,180 business mailboxes (11,317 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 20151?

The closest, measured center to center: 20171 (3.3 mi, Franklin Farm), 20120 (3.5 mi, Bull Run), 22033 (3.5 mi, Fair Oaks), 20152 (4 mi, South Riding), 20166 (5.1 mi, Dulles Town Center) and 22035 (5.2 mi, Fair Oaks).

20151 ZIP Code, Chantilly, VA

20151 is a ZIP code in Chantilly, Virginia in Fairfax County. It covers 16 square miles of land. The closest ZIP codes are 20171, 20120 and 22033. 22,610 people live here in 7,095 households. At about 1,426 people per square mile it has suburban density, and most homes are owner-occupied (81%). Median household income is $158,271, well above the Virginia median of $93,170; 43% of households have children under 18.

Quick facts

Mailing city: Chantilly, VA
County: Fairfax County
Land area: 16 sq mi
Population: 22,610
Median household income: $158,271
Carrier routes: 22 (9,134 homes)

Key figures

Measure	Value
Residents	22,610
Households	7,095
Median household income	$158,271
Income per person	$60,395
Median age	41.5
Homeowners	81.0%
Median home value	$676,800
Median rent	$2,280
Bachelor's degree or higher	59.3%
Average commute (minutes)	28
Households with kids under 18	43.0%
Moved in the past year	10.7%
Below the poverty line	6.2%
Broadband internet	97.4%
Speak a non-English language at home	53.1%

Household income

% of households	Value
<$10K	0.9%
$10–15K	0.6%
$15–25K	3.7%
$25–35K	1.7%
$35–50K	5.5%
$50–75K	9.8%
$75–100K	9.9%
$100–150K	15.6%
$150–200K	15.4%
$200K+	37.0%

Age

% of all residents	Value
<10	11.3%
10–19	15.2%
20–24	6.2%
25–34	10.4%
35–44	13.3%
45–54	17.0%
55–64	12.9%
65–74	8.8%
75+	4.8%

Tenure

% of housing units	Value
Owned, with mortgage	54.3%
Owned outright	26.6%
Rented	18.5%
Vacant	0.6%

Type of building

% of housing units	Value
Detached house	62.6%
Townhome	20.5%
2–4 units	2.3%
5–19 units	4.7%
20+ units	4.8%
Mobile / other	5.2%

Businesses in 20151

1,988 business establishments with 64,615 employees (ZIP Codes Business Patterns 2023).

Professional, Scientific, and Technical Services: 559
Construction: 207
Retail Trade: 154
Accommodation and Food Services: 154
Other Services (except Public Administration): 145
Health Care and Social Assistance: 142
Wholesale Trade: 126
Administrative and Support and Waste Management and Remediation Services: 124

EDDM carrier routes

20151 has 22 USPS carrier routes with 9,134 residential and 2,180 business mailboxes. Open the EDDM route map.

Carrier routes in 20151

20151 has 22 USPS carrier routes (22 rural (R)) with 9,134 residential and 2,180 business mailboxes. Routes range from 1 homes (R014) to 1,184 homes (R019); the median route has 445 homes. The Census counted 7,095 households in 20151 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	4
250–499	9
500–749	6
750–999	0
1,000–1,499	1
1,500+	0

Best routes in 20151 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

Route R008 — USPS business mailboxes 339, 0 homes
Route R112 — USPS business mailboxes 287, 0 homes
Route R047 — USPS business mailboxes 258, 333 homes
Route R002 — USPS business mailboxes 218, 245 homes
Route R014 — USPS business mailboxes 209, 1 homes

Select these 5 routes on the route map

Every carrier route in 20151

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
R002	Rural	245	218	$135,107	—	—	—
R003	Rural	417	110	$200,001+	—	—	—
R004	Rural	433	2	$200,001+	—	—	—
R005	Rural	494	2	$200,001+	—	—	—
R008	Rural	0	339	$114,539	—	—	—
R009	Rural	603	4	$200,001+	—	—	—
R010	Rural	499	76	$66,607	—	—	—
R011	Rural	598	1	$200,001+	—	—	—
R012	Rural	738	59	$114,539	—	—	—
R013	Rural	334	113	$114,539	—	—	—
R014	Rural	1	209	$114,539	—	—	—
R015	Rural	149	187	$175,684	—	—	—
R017	Rural	412	1	$175,684	—	—	—
R018	Rural	319	123	$182,578	—	—	—
R019	Rural	1,184	55	$135,107	—	—	—
R025	Rural	233	0	$114,539	—	—	—
R045	Rural	457	34	$114,539	—	—	—
R046	Rural	531	46	$114,539	—	—	—
R047	Rural	333	258	$66,607	—	—	—
R075	Rural	562	53	$182,578	—	—	—
R111	Rural	592	3	$182,578	—	—	—
R112	Rural	0	287	$66,607	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 20151 on the EDDM route map.

How route demographics are estimated

Mailbox counts come from USPS; demographics are estimates

The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).

How a route gets its figures: the block-group length-share method

We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.

Margins of error

Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.

Different years

USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.

Why some routes show identical figures

Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.

Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Nearby ZIP codes

20171 — Franklin Farm CDP, VA (3.3 mi)
20120 — Bull Run CDP, VA (3.5 mi)
22033 — Fair Oaks CDP, VA (3.5 mi)
20152 — South Riding CDP, VA (4 mi)
20166 — Dulles Town Center CDP, VA (5.1 mi)
22035 — Fair Oaks CDP, VA (5.2 mi)
20191 — Reston CDP, VA (5.6 mi)
20121 — Bull Run CDP, VA (6 mi)

Areas that include 20151

Chantilly, VA ZIP codes — 2 ZIP codes
Sully Square, VA ZIP codes — 2 ZIP codes
Fairfax County ZIP codes — 45 ZIP codes
Virginia ZIP code data

Where it ranks

Mail every home in 20151

Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 20151, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 20151 in?: 20151 is a Chantilly, VA mailing address. By land area, 73% lies inside Chantilly and 2% lies inside Sully Square; the rest is outside any Census-defined city or community.
What county is 20151 in?: 20151 is in Fairfax County.
What is the population of 20151?: About 22,610 people (±1,387), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 22,653.
What is the median household income in 20151?: $158,271 (±$11,415), compared with $93,170 for Virginia as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 20151?: 22 USPS carrier routes with 9,134 residential and 2,180 business mailboxes (11,317 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 20151?: The closest, measured center to center: 20171 (3.3 mi, Franklin Farm), 20120 (3.5 mi, Bull Run), 22033 (3.5 mi, Fair Oaks), 20152 (4 mi, South Riding), 20166 (5.1 mi, Dulles Town Center) and 22035 (5.2 mi, Fair Oaks).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.