ZIP code · Rockville · Maryland · United States

ZIP code 20857 — Rockville

Name: Rockville (20857)
Address: Maryland, 20857, US

ZIP code 20857 serves Rockville, Maryland.

Postal code: 20857
Single source Value from one source, not cross-checked.
City: Rockville
County: Montgomery
State: Maryland
Country: United States
Coordinates: 39.0840, -77.1528 — precision precise (locality)
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Time zone: America/New_York (UTC−5 / UTC−4 DST)

Nearby localities

20883Gaithersburg · 0.6 km
20855Derwood · 5.6 km
20854Potomac · 6.1 km
20880Washington Grove · 6.3 km
20877Gaithersburg · 7.2 km
20896Garrett Park · 7.4 km
20906Silver Spring · 7.9 km
20813Bethesda · 8.2 km
20827Bethesda · 8.2 km
20889Bethesda · 8.2 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. Data generated on 2026-08-21. Methodology · Report an error on this page