ZIP code · Ellicott City · Maryland · United States

ZIP code 21042 — Ellicott City

Name: Ellicott City (21042)
Address: Maryland, 21042, US

ZIP code 21042 serves Ellicott City, Maryland.

Postal code: 21042
Single source Value from one source, not cross-checked.
City: Ellicott City
County: Howard
State: Maryland
Country: United States
Coordinates: 39.2726, -76.8614 — precision precise (locality)
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Population: 43,021 (ZCTA, ACS 5-year)
Median household income: $190,504
Median age: 45
Time zone: America/New_York (UTC−5 / UTC−4 DST)

Nearby localities

21044Columbia · 6.7 km
21045Columbia · 7.9 km
21150Simpsonville · 8.0 km
21104Marriottsville · 8.2 km
21163Woodstock · 8.7 km
21794West Friendship · 9.3 km
21244Windsor Mill · 9.4 km
21029Clarksville · 10 km
21228Catonsville · 10 km
21046Columbia · 11 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