What city is 20171 in?

20171 is a Herndon, VA mailing address. By land area, 36% lies inside Franklin Farm, 24% lies inside Floris, 17% lies inside McNair and 17% lies inside Difficult Run.

What is the population of 20171?

About 51,286 people (±1,991), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 51,759.

What is the median household income in 20171?

$171,372 (±$10,043), 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 20171?

32 USPS carrier routes with 22,344 residential and 738 business mailboxes (23,083 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 20171?

The closest, measured center to center: 20191 (2.5 mi, Reston), 20151 (3.3 mi, Chantilly), 22033 (3.6 mi, Fair Oaks), 20190 (3.7 mi, Reston), 20170 (3.8 mi, Herndon) and 22124 (4.2 mi, Difficult Run).

20171 ZIP Code, Herndon, VA

20171 is a ZIP code in Herndon, Virginia in Fairfax County. It covers 12 square miles of land. The closest ZIP codes are 20191, 20151 and 22033. 51,286 people live here in 18,923 households, more than in 9 of every 10 Virginia ZIP codes. At about 4,415 people per square mile it is built up to city-neighborhood density, and owners and renters are mixed (57% own). Median household income is $171,372, well above the Virginia median of $93,170.

Quick facts

Mailing city: Herndon, VA
County: Fairfax County
Land area: 12 sq mi
Population: 51,286
Median household income: $171,372
Carrier routes: 32 (22,344 homes)

Key figures

Measure	Value
Residents	51,286
Households	18,923
Median household income	$171,372
Income per person	$77,217
Median age	36.2
Homeowners	56.9%
Median home value	$797,200
Median rent	$2,304
Bachelor's degree or higher	75.0%
Average commute (minutes)	26.6
Households with kids under 18	37.8%
Moved in the past year	15.8%
Below the poverty line	3.6%
Broadband internet	97.0%
Speak a non-English language at home	42.0%

Household income

% of households	Value
<$10K	1.9%
$10–15K	1.0%
$15–25K	1.8%
$25–35K	1.0%
$35–50K	3.9%
$50–75K	9.7%
$75–100K	6.6%
$100–150K	18.0%
$150–200K	14.8%
$200K+	41.5%

Age

% of all residents	Value
<10	11.2%
10–19	13.6%
20–24	6.7%
25–34	16.0%
35–44	17.2%
45–54	13.4%
55–64	11.2%
65–74	6.9%
75+	3.8%

Tenure

% of housing units	Value
Owned, with mortgage	43.1%
Owned outright	12.0%
Rented	41.0%
Vacant	3.9%

Type of building

% of housing units	Value
Detached house	41.5%
Townhome	20.6%
2–4 units	2.4%
5–19 units	11.7%
20+ units	23.7%
Mobile / other	0.0%

Businesses in 20171

1,725 business establishments with 63,865 employees (ZIP Codes Business Patterns 2023).

Professional, Scientific, and Technical Services: 873
Administrative and Support and Waste Management and Remediation Services: 118
Health Care and Social Assistance: 95
Accommodation and Food Services: 83
Information: 80
Real Estate and Rental and Leasing: 79
Other Services (except Public Administration): 70
Management of Companies and Enterprises: 56

EDDM carrier routes

20171 has 32 USPS carrier routes with 22,344 residential and 738 business mailboxes. Open the EDDM route map.

Carrier routes in 20171

20171 has 32 USPS carrier routes (32 rural (R)) with 22,344 residential and 738 business mailboxes. Routes range from 424 homes (R042) to 1,208 homes (R057); the median route has 568 homes. The Census counted 18,923 households in 20171 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	5
500–749	16
750–999	7
1,000–1,499	4
1,500+	0

Best routes in 20171 for…

Most businesses

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

Route R029 — USPS business mailboxes 169, 515 homes
Route R045 — USPS business mailboxes 105, 521 homes
Route R050 — USPS business mailboxes 102, 683 homes
Route R042 — USPS business mailboxes 77, 424 homes
Route R038 — USPS business mailboxes 55, 547 homes

Select these 5 routes on the route map

Every carrier route in 20171

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
R020	Rural	536	0	$200,001+	—	—	—
R021	Rural	446	0	$200,001+	—	—	—
R022	Rural	497	3	$200,001+	—	—	—
R023	Rural	513	2	$200,001+	—	—	—
R024	Rural	473	33	$200,001+	—	—	—
R025	Rural	505	39	$188,769	—	—	—
R027	Rural	568	2	$188,769	—	—	—
R028	Rural	567	1	$200,001+	—	—	—
R029	Rural	515	169	$174,088	—	—	—
R030	Rural	572	0	$200,001+	—	—	—
R031	Rural	560	1	$200,001+	—	—	—
R032	Rural	910	4	$200,001+	—	—	—
R033	Rural	564	1	$200,001+	—	—	—
R035	Rural	1,091	15	$129,060	—	—	—
R036	Rural	516	0	$200,001+	—	—	—
R037	Rural	966	1	$174,088	—	—	—
R038	Rural	547	55	$200,001+	—	—	—
R040	Rural	530	1	$200,001+	—	—	—
R041	Rural	653	1	$200,001+	—	—	—
R042	Rural	424	77	$190,030	—	—	—
R045	Rural	521	105	$129,060	—	—	—
R047	Rural	863	3	$200,001+	—	—	—
R048	Rural	790	36	$174,088	—	—	—
R049	Rural	491	4	$200,001+	—	—	—
R050	Rural	683	102	$155,454	—	—	—
R052	Rural	953	19	$88,537	—	—	—
R054	Rural	744	13	$129,060	—	—	—
R055	Rural	808	2	$155,454	—	—	—
R057	Rural	1,208	21	$129,060	—	—	—
R058	Rural	955	1	$190,030	—	—	—
R059	Rural	1,177	2	$174,088	—	—	—
R060	Rural	1,198	25	$129,060	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 20171 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

20191 — Reston CDP, VA (2.5 mi)
20151 — Chantilly CDP, VA (3.3 mi)
22033 — Fair Oaks CDP, VA (3.6 mi)
20190 — Reston CDP, VA (3.7 mi)
20170 — Herndon town, VA (3.8 mi)
22124 — Difficult Run CDP, VA (4.2 mi)
20166 — Dulles Town Center CDP, VA (4.7 mi)
20194 — Reston CDP, VA (4.8 mi)

Areas that include 20171

Herndon, VA ZIP codes — 2 ZIP codes
McNair, VA ZIP codes — 1 ZIP code
Franklin Farm, VA ZIP codes — 2 ZIP codes
Difficult Run, VA ZIP codes — 2 ZIP codes
Floris, VA ZIP codes — 1 ZIP code
Navy, 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 20171

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) 20171, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 20171 in?: 20171 is a Herndon, VA mailing address. By land area, 36% lies inside Franklin Farm, 24% lies inside Floris, 17% lies inside McNair and 17% lies inside Difficult Run.
What county is 20171 in?: 20171 is in Fairfax County.
What is the population of 20171?: About 51,286 people (±1,991), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 51,759.
What is the median household income in 20171?: $171,372 (±$10,043), 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 20171?: 32 USPS carrier routes with 22,344 residential and 738 business mailboxes (23,083 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 20171?: The closest, measured center to center: 20191 (2.5 mi, Reston), 20151 (3.3 mi, Chantilly), 22033 (3.6 mi, Fair Oaks), 20190 (3.7 mi, Reston), 20170 (3.8 mi, Herndon) and 22124 (4.2 mi, Difficult Run).

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