ZIP code · Rockville · Maryland · United States

ZIP code 20851 — Rockville

Name: Rockville (20851)
Address: Maryland, 20851, US

ZIP code 20851 serves Rockville, Maryland.

Postal code: 20851
Single source Value from one source, not cross-checked.
City: Rockville
County: Montgomery
State: Maryland
Country: United States
Coordinates: 39.0763, -77.1234 — precision precise (locality)
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Population: 14,660 (ZCTA, ACS 5-year)
Median household income: $113,951
Median age: 38.6
Time zone: America/New_York (UTC−5 / UTC−4 DST)

Nearby localities

20883Gaithersburg · 3.2 km
20896Garrett Park · 5.1 km
20906Silver Spring · 5.4 km
20895Kensington · 6.4 km
20855Derwood · 6.8 km
20891Kensington · 6.9 km
20854Potomac · 7.3 km
20902Silver Spring · 7.9 km
20880Washington Grove · 8.1 km
20892Bethesda · 8.4 km

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). Data generated on 2026-08-21. Methodology · Report an error on this page