ZIP code · Annapolis · Maryland · United States

ZIP code 21402 — Annapolis

ZIP code 21402 serves Annapolis, Maryland.

Postal code
21402
Single source Value from one source, not cross-checked.
City
Annapolis
County
Anne Arundel FIPS 24003
State
Maryland
Country
United States
Coordinates
38.9871, -76.4715 — precision precise (locality)
View on OpenStreetMap
Population
2,390 (ZCTA, ACS 5-year)
Population density
1,276 / sq mi
Land area
1.9 sq mi (4.9 km²) (ZCTA, ACS 5-year)
Median household income
$85,893
Per-capita income
$31,553
Median age
21.6
Households
358
Housing units
428
Median gross rent
$2,690 / month
Congressional district
MD-3 (119th Congress)
USDA hardiness zone
8a (10 to 15 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
Time zone
America/New_York (UTC−5 / UTC−4 DST)
Area codes
443, 410, 667
Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.

Climate — monthly normals

Warmest month Jul (avg high 86°F), coldest Jan (avg low 30°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F434553647382868477675647
Avg low °F303238475768727165524234
Precip in2.82.43.83.43.14.04.94.35.14.03.03.0

NOAA 1991–2020 climate normals from the nearest station: ANNAPOLIS NAF (0.4 mi) · NOAA NCEI

Places in ZIP 21402

Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology

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) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page