ZIP code · Ellicott City · Maryland · United States

ZIP code 21041 — Ellicott City

ZIP code 21041 serves Ellicott City, Maryland.

Postal code: 21041
Single source Value from one source, not cross-checked.
City: Ellicott City
County: Howard
State: Maryland
Country: United States
Coordinates: 39.2364, -76.9419 — precision precise (locality)
View on OpenStreetMap
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.

Tools: compare 21041 with another ZIP · ZIPs within 25 miles · distance from 21041

Climate — monthly normals

Warmest month Jul (avg high 89°F), coldest Jan (avg low 26°F).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high °F	43	46	55	67	76	84	89	87	80	69	57	47
Avg low °F	26	28	35	45	55	65	69	68	61	50	39	31
Precip in	3.5	2.7	4.2	3.8	4.4	4.4	4.2	3.8	4.7	4.4	3.5	3.9

NOAA 1991–2020 climate normals from the nearest station: LAUREL 3 W (10.7 mi) · NOAA NCEI

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 · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page