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Zip Code 21056 — Gibson Island, MD

21056 is a ZIP Code associated with Gibson Island, MD, located within Anne Arundel. The postal region supports an estimated population of 291 residents across Data Pending housing units, with a population density of 81.6 people per square mile.

WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (39.078050, -76.433800)

Data Metric	Local Statistic
Postal / Zip Code	21056
Primary City	Gibson Island
State / Province	MD
County	Anne Arundel
Total Population	291
Median Household Income	Data Pending
Total Housing Units	Data Pending
Population Density	81.6 people/sq mi
Timezone	America/New_York

How 21056 Compares

Metric	ZIP 21056	Anne Arundel County	MD State Average
Population	291	611,016	6,205,597
Median Income	Data Pending	N/A	N/A
Population Density	81.6 /sq mi	--	--

Nearby ZIP Codes

ZIP Code	City	Distance	Population	Median Income
Zip 21012	Arnold	4.1 mi	22,570	N/A
Zip 21409	Annapolis	4.1 mi	20,289	N/A
Zip 21122	Pasadena	4.4 mi	61,566	N/A
Zip 21402	Annapolis	6.5 mi	4,303	N/A
Zip 21146	Severna Park	6.6 mi	28,591	N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →