Zip Code 21133 — Randallstown, MD

ZIP Code 21133 is associated with Randallstown, MD, in Baltimore County. The listed population estimate is 31,398; estimated density is 1,352.9 people per square mile. Among records with population estimates, it ranks #22 of 65 in Baltimore County and #79 of 470 in MD.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (39.377050, -76.811740)

Data MetricLocal Statistic
Postal / Zip Code21133
Primary CityRandallstown
State / ProvinceMD
CountyBaltimore
Total Population31,398
Population Density1,352.9 people/sq mi
TimezoneAmerica/New_York

How 21133 Compares

MetricZIP 21133Baltimore County recordsMD records
Population estimate31,3981,414,366 (sum)6,205,597 (sum)
Population Density1,352.9 /sq mi----
County population rank#22 of 65----
State population rank#79 of 470----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in MD

ZIP CodeCityDistancePopulation estimate
ZIP 21244Windsor Mill3.4 mi38,208
ZIP 21163Woodstock3.5 mi7,539
ZIP 21117Owings Mills3.9 mi62,816
ZIP 21208Pikesville4.6 mi37,276
ZIP 21104Marriottsville5.4 mi6,052

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 →