Home > MD > Anne Arundel County > Arnold > Zip 21012

Zip Code 21012 — Arnold, MD

21012 is a ZIP Code associated with Arnold, MD, located within Anne Arundel. The postal region supports an estimated population of 22,570 residents across Data Pending housing units, with a population density of 891.1 people per square mile.

WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (39.045290, -76.497160)

Data Metric	Local Statistic
Postal / Zip Code	21012
Primary City	Arnold
State / Province	MD
County	Anne Arundel
Total Population	22,570
Median Household Income	Data Pending
Total Housing Units	Data Pending
Population Density	891.1 people/sq mi
Timezone	America/New_York

How 21012 Compares

Metric	ZIP 21012	Anne Arundel County	MD State Average
Population	22,570	611,016	6,205,597
Median Income	Data Pending	N/A	N/A
Population Density	891.1 /sq mi	--	--

Nearby ZIP Codes

ZIP Code	City	Distance	Population	Median Income
Zip 21405	Annapolis	3.0 mi	495	N/A
Zip 21409	Annapolis	3.2 mi	20,289	N/A
Zip 21146	Severna Park	3.9 mi	28,591	N/A
Zip 21056	Gibson Island	4.1 mi	291	N/A
Zip 21402	Annapolis	4.2 mi	4,303	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 →