Find the last 4 digits (ZIP+4) for an address in 20166

ZIP 20166, Sterling, VA is filled in. Just type the street address.

Addresses are checked through our secure proxy. Bot checks use Cloudflare Turnstile. Each device can run 5 live checks per day; repeats of the same address are free.

ZIP Code 20166 – Sterling, VA

Sterling, Virginia · Loudoun County · Eastern time

ZIP code20166
CitySterling
StateVirginia
CountyLoudoun County
Population14,949
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area27.19 sq mi
Center (lat, long)38.9700, -77.4640

Area codes in this area

703571

These are the area codes that most often serve ZIP 20166 (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Map

Nearby ZIP codes

20598 Dhs · 1.7 mi20103 Dulles · 2 mi20101 Dulles · 2.5 mi20189 Dulles · 2.9 mi20163 Sterling · 3.1 mi20167 Sterling · 3.1 mi20148 Ashburn · 4 mi20172 Herndon · 4.2 mi

About ZIP 20166

ZIP code 20166 is assigned to Sterling, Virginia. It lies in Loudoun County. Its Census area covers about 27.19 square miles of land. The closest neighboring ZIP is 20598 (Dhs), about 1.7 miles away.

Every address in 20166 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources