What to know about ZIP 21240
ZIP code 21240 covers MD in Anne Arundel County.
It sits in telephone area codes 410, 443, 667; U.S. House district MD-3; the BALTIMORE media market.
, MD
ZIP Code 21240 — undefined, MD Demographics & Data
Source: U.S. Census Bureau ACS 2019–2023 5-Year Estimates. Page data updated 2026-08-02.
Low Snow Area
Map, Quick Facts & Location
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At a glance
Overview of ZIP Code 21240
Climate risk and migration signals
FEMA’s National Risk Index rates natural-hazard risk for MD as Relatively Moderate (composite score 81.9), which is elevated versus much of the country. The strongest component scores on US5 are hurricane (87.2) and flood (80.9). These scores are county-linked NRI values published for planning context — all ZIP codes in the same county share the same composite score on US5. Useful when comparing insurance and disaster exposure across areas, not a substitute for a parcel-level flood or fire determination.
Climate normals for MD show little to no average snow and around 45.0 inches of annual precipitation.
Nearby (from this ZIP)
Airport BWI (0.3 miles (0.4 km)) · University of Maryland-Baltimore County (6.0 miles (9.6 km)) · Fort McHenry National Monument and Historic Shrine (7.9 miles (12.7 km)) · VA: VISN 5: VA Capitol Health Care Network (2.1 miles (3.4 km))
Full lists and map pins are in the Infrastructure section below.