20191 ZIP Code, Reston, VA
20191 is a ZIP code in Reston, Virginia in Fairfax County. It covers 7.8 square miles of land. The closest ZIP codes are 20190, 20171 and 22124. 31,011 people live here in 12,163 households. At about 3,998 people per square mile it has suburban density, and owners and renters are mixed (68% own). Median household income is $151,185, well above the Virginia median of $93,170.
Quick facts
- Mailing city: Reston, VA
- County: Fairfax County
- Land area: 7.8 sq mi
- Population: 31,011
- Median household income: $151,185
- Carrier routes: 19 (13,326 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 31,011 |
| Households | 12,163 |
| Median household income | $151,185 |
| Income per person | $69,229 |
| Median age | 39.3 |
| Homeowners | 68.0% |
| Median home value | $641,800 |
| Median rent | $2,016 |
| Bachelor's degree or higher | 67.5% |
| Average commute (minutes) | 25.3 |
| Households with kids under 18 | 29.0% |
| Moved in the past year | 16.7% |
| Below the poverty line | 5.4% |
| Broadband internet | 97.3% |
| Speak a non-English language at home | 34.8% |
Household income
| % of households | Value |
|---|---|
| <$10K | 3.0% |
| $10–15K | 1.4% |
| $15–25K | 2.9% |
| $25–35K | 2.2% |
| $35–50K | 4.6% |
| $50–75K | 10.3% |
| $75–100K | 8.1% |
| $100–150K | 16.9% |
| $150–200K | 17.4% |
| $200K+ | 33.2% |
Age
| % of all residents | Value |
|---|---|
| <10 | 11.8% |
| 10–19 | 11.3% |
| 20–24 | 7.2% |
| 25–34 | 14.1% |
| 35–44 | 15.4% |
| 45–54 | 11.6% |
| 55–64 | 12.2% |
| 65–74 | 9.0% |
| 75+ | 7.2% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 46.5% |
| Owned outright | 17.3% |
| Rented | 29.7% |
| Vacant | 6.4% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 27.6% |
| Townhome | 34.4% |
| 2–4 units | 3.0% |
| 5–19 units | 18.0% |
| 20+ units | 16.9% |
| Mobile / other | 0.1% |
Businesses in 20191
974 business establishments with 35,121 employees (ZIP Codes Business Patterns 2023).
- Professional, Scientific, and Technical Services: 393
- Health Care and Social Assistance: 99
- Finance and Insurance: 67
- Information: 65
- Other Services (except Public Administration): 64
- Real Estate and Rental and Leasing: 58
- Administrative and Support and Waste Management and Remediation Services: 51
- Construction: 39
EDDM carrier routes
20191 has 19 USPS carrier routes with 13,326 residential and 622 business mailboxes. Open the EDDM route map.
Carrier routes in 20191
20191 has 19 USPS carrier routes (18 city (C), 1 rural (R)) with 13,326 residential and 622 business mailboxes. Routes range from 404 homes (R091) to 1,211 homes (C024); the median route has 675 homes. The Census counted 12,163 households in 20191 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 2 |
| 500–749 | 9 |
| 750–999 | 6 |
| 1,000–1,499 | 2 |
| 1,500+ | 0 |
Best routes in 20191 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C024 — USPS business mailboxes 162, 1,211 homes
- Route C043 — USPS business mailboxes 89, 624 homes
- Route C040 — USPS business mailboxes 79, 749 homes
- Route C035 — USPS business mailboxes 72, 674 homes
- Route C045 — USPS business mailboxes 69, 415 homes
Select these 5 routes on the route map
Every carrier route in 20191
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C021 | City | 675 | 1 | $200,001+ | — | — | — |
| C022 | City | 545 | 4 | $180,020 | — | — | — |
| C024 | City | 1,211 | 162 | $74,662 | — | — | — |
| C025 | City | 527 | 50 | $174,532 | — | — | — |
| C034 | City | 824 | 2 | $174,532 | — | — | — |
| C035 | City | 674 | 72 | $174,532 | — | — | — |
| C038 | City | 757 | 1 | $94,164 | — | — | — |
| C039 | City | 593 | 2 | $180,020 | — | — | — |
| C040 | City | 749 | 79 | $200,001+ | — | — | — |
| C041 | City | 787 | 3 | $94,164 | — | — | — |
| C043 | City | 624 | 89 | $177,852 | — | — | — |
| C044 | City | 864 | 22 | $90,788 | — | — | — |
| C045 | City | 415 | 69 | $113,743 | — | — | — |
| C049 | City | 1,063 | 4 | $90,788 | — | — | — |
| C082 | City | 512 | 2 | $200,001+ | — | — | — |
| C083 | City | 523 | 3 | $151,510 | — | — | — |
| C084 | City | 826 | 5 | $174,532 | — | — | — |
| C086 | City | 753 | 50 | $177,852 | — | — | — |
| R091 | Rural | 404 | 2 | $200,001+ | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 20191 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
- 20190 — Reston CDP, VA (1.9 mi)
- 20171 — Franklin Farm CDP, VA (2.5 mi)
- 22124 — Difficult Run CDP, VA (2.9 mi)
- 20194 — Reston CDP, VA (3.3 mi)
- 20170 — Herndon town, VA (3.6 mi)
- 22181 — Oakton CDP, VA (3.8 mi)
- 22182 — Wolf Trap CDP, VA (4 mi)
- 22033 — Fair Oaks CDP, VA (4.4 mi)
Areas that include 20191
- Reston, VA ZIP codes — 3 ZIP codes
- Fairfax County ZIP codes — 45 ZIP codes
- Virginia ZIP code data
Where it ranks
Mail every home in 20191
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) 20191, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 20191 in?
- 20191 is a Reston, VA mailing address. By land area, 98% lies inside Reston and 2% lies inside Difficult Run.
- What county is 20191 in?
- 20191 is in Fairfax County.
- What is the population of 20191?
- About 31,011 people (±1,526), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 29,948.
- What is the median household income in 20191?
- $151,185 (±$7,673), 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 20191?
- 19 USPS carrier routes with 13,326 residential and 622 business mailboxes (13,947 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 20191?
- The closest, measured center to center: 20190 (1.9 mi, Reston), 20171 (2.5 mi, Franklin Farm), 22124 (2.9 mi, Difficult Run), 20194 (3.3 mi, Reston), 20170 (3.6 mi, Herndon) and 22181 (3.8 mi, Oakton).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.