ZIP code · Gibson Island · Maryland · United States
ZIP code 21056 — Gibson Island
ZIP code 21056 serves Gibson Island, Maryland.
- Postal code
- 21056Single source Value from one source, not cross-checked.
- City
- Gibson Island
- County
- Anne Arundel
- State
- Maryland
- Country
- United States
- Coordinates
- 39.0751, -76.4324 — precision precise (locality)
View on OpenStreetMap - Population
- 264 (ZCTA, ACS 5-year)
- Median household income
- $250,001
- Median age
- 66.6
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
Nearby localities
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