ZIP code · Herndon · Virginia · United States
ZIP code 20171 — Herndon
ZIP code 20171 serves Herndon, Virginia.
- Postal code
- 20171Single source Value from one source, not cross-checked.
- City
- Herndon
- County
- Fairfax FIPS 51059
- State
- Virginia
- Country
- United States
- Coordinates
- 38.9252, -77.3928 — precision precise (locality)
View on OpenStreetMap - Population
- 50,796 (ZCTA, ACS 5-year)
- Population density
- 4,372 / sq mi
- Land area
- 11.6 sq mi (30.1 km²) (ZCTA, ACS 5-year)
- Median household income
- $166,154
- Per-capita income
- $76,225
- Median age
- 35.8
- Households
- 18,634
- Housing units
- 19,221
- Median home value
- $770,200
- Median gross rent
- $2,276 / month
- Congressional district
- VA-11 (119th Congress)
- USDA hardiness zone
- 7b (5 to 10 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
Tools: compare 20171 with another ZIP · ZIPs within 25 miles · distance from 20171
Map of ZIP code 20171
Climate — monthly normals
Warmest month Jul (avg high 88°F), coldest Jan (avg low 25°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 43 | 46 | 55 | 67 | 75 | 83 | 88 | 86 | 79 | 68 | 57 | 47 |
| Avg low °F | 25 | 27 | 34 | 43 | 53 | 62 | 67 | 65 | 58 | 45 | 36 | 29 |
| Precip in | 2.9 | 2.6 | 3.5 | 3.5 | 4.7 | 4.3 | 4.2 | 3.5 | 3.9 | 3.6 | 3.1 | 3.3 |
NOAA 1991–2020 climate normals from the nearest station: WASHINGTON DC DULLES AP (4.0 mi) · NOAA NCEI
Places in ZIP 20171
- 15 schools
- 8 doctors & dentists
- 2 pharmacies
- 5 supermarkets
- 56 restaurants & cafés
- 2 bars & pubs
- 37 parks
- 78 playgrounds
- 7 gyms & sports centres
- 2 post offices
- 17 places of worship
- 4 banks
- 7 gas stations
- 3 EV charging stations
- 3 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page