ZIP code · Ellicott City · Maryland · United States

ZIP code 21043 — Ellicott City

ZIP code 21043 serves Ellicott City, Maryland.

Postal code
21043
Single source Value from one source, not cross-checked.
City
Ellicott City
County
Howard FIPS 24027
State
Maryland
Country
United States
Coordinates
39.2548, -76.8001 — precision precise (locality)
View on OpenStreetMap
Population
47,134 (ZCTA, ACS 5-year)
Population density
2,757 / sq mi
Land area
17.1 sq mi (44.3 km²) (ZCTA, ACS 5-year)
Median household income
$141,846
Per-capita income
$64,911
Median age
39.4
Households
17,246
Housing units
17,978
Median home value
$607,300
Median gross rent
$1,964 / month
Congressional districts
MD-3 (also MD-2) (119th Congress)
USDA hardiness zone
7b (5 to 10 °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
410, 443, 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 89°F), coldest Jan (avg low 25°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F434655677684898780685748
Avg low °F252734445363686659473730
Precip in3.12.94.03.43.94.04.54.14.43.93.13.7

NOAA 1991–2020 climate normals from the nearest station: BALTIMORE WASH INTL AP (8.7 mi) · NOAA NCEI

Places in ZIP 21043

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