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Zip Code 21043 — Ellicott City, MD

21043 is a ZIP Code associated with Ellicott City, MD, located within Howard. 21043 ranks #1 out of 20 ZIP codes in Howard County by population (and #22 out of 477 in MD). The area supports an estimated population of 48,525 residents across Data Pending housing units, with a population density of 1,095.9 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (39.257590, -76.797730)

Data MetricLocal Statistic
Postal / Zip Code21043
Primary CityEllicott City
State / ProvinceMD
CountyHoward
Total Population48,525
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density1,095.9 people/sq mi
TimezoneAmerica/New_York

How 21043 Compares

MetricZIP 21043Howard CountyMD State Average
Population48,525335,512 (Total)6,205,597 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density1,095.9 /sq mi----
County Pop Rank#1 of 20----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 21228Catonsville2.9 mi50,492N/A
Zip 21045Columbia3.9 mi40,034N/A
Zip 21075Elkridge4.4 mi37,363N/A
Zip 21250Baltimore4.6 mi2,834N/A
Zip 21042Ellicott City5.1 mi43,327N/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 →