Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/MD/GIBSON-ISLAND

Gibson Island ZIP code, Maryland

The ZIP code for Gibson Island, MD is 21056, and its area codes are 443, 410 and 667.

USPS city name
1 ZIP code
Population
291
Area codes
443, 410, 667

NANPA lists no telephone rate centre for Gibson Island itself, so these are the area codes of the nearest one, Annapolis (4.2 miles). A town on an area-code boundary can differ from its neighbour.

Gibson Island in numbers

About 291 people live in Gibson Island, in 145 households.

Population291Gibson Island291
Households145Gibson Island145

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the ZIP code addressed as Gibson Island. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Gibson Island

ZIP codes with the USPS city name Gibson Island
ZIP City Type Population Median income Median home
21056 Gibson Island , MD Standard 291 $250,000+ $2,000,000+

Map of Gibson Island ZIP codes

21056

The ZIP codes of Gibson Island, MD, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Gibson Island

The nearest larger towns are Cape St. Claire (9,236 people, 2.5 mi), Lake Shore (18,249 people, 3.0 mi) and Arnold (24,303 people, 4.4 mi).

Towns near Gibson Island
TownPopulationDistance
Cape St. Claire 9,236 2.5 mi
Lake Shore 18,249 3.0 mi
Arnold 24,303 4.4 mi
Severna Park 40,228 6.9 mi
Naval Academy 3,006 7.0 mi
Riviera Beach 12,192 7.7 mi
Annapolis 40,720 8.3 mi
Pasadena 34,309 8.5 mi
Parole 17,229 8.9 mi
Stevensville 8,802 9.6 mi
Edgemere 9,061 9.9 mi
Annapolis Neck 12,032 10.4 mi
Glen Burnie 72,590 10.6 mi
Edgewater 8,519 11.4 mi

More nearby: every ZIP code in Anne Arundel County · Maryland ZIP codes

Cite this page

zipcodes.pro. “Gibson Island, MD ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/md/gibson-island

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