Baltimore County, Maryland ZIP Codes

44 ZIP Codes

Zip Code
City
Population
21234Parkville66,334
21117Owings Mills62,816
21222Dundalk59,407
21228Catonsville50,492
21207Gwynn Oak47,099
21221Essex43,487
21220Middle River42,824
21236Nottingham39,514
21093Lutherville Timonium39,100
21244Windsor Mill38,208
21208Pikesville37,276
21227Halethorpe34,907
21136Reisterstown32,088
21237Rosedale31,425
21133Randallstown31,398
21209Baltimore30,126
21030Cockeysville25,827
21286Towson21,853
21204Towson19,845
21128Perry Hall15,501
21219Sparrows Point9,565
21163Woodstock7,539
21120Parkton7,440
21131Phoenix7,141
21152Sparks Glencoe6,459
21013Baldwin5,610
21087Kingsville5,537
21252Towson4,865
21111Monkton4,714
21162White Marsh4,639
21057Glen Arm4,386
21155Upperco3,313
21053Freeland2,929
21250Baltimore2,834
21082Hydes626
21153Stevenson456
21052Fort Howard409
21071Glyndon404
21156Upper Falls204
21051Fork172
21023Butler66
21105Maryland Line36
21031Hunt Valley26
21285Towson3

Overview of ZIP Codes in Baltimore County

ZCTAs are geographic areas created by the US Census Bureau to approximate the delivery areas of ZIP Codes for statistical analysis. While ZCTAs use the same five-digit codes as ZIP Codes, they represent defined geographic areas that may not exactly match the mail delivery routes of ZIP Codes.
44
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 44 ZCTAs in Baltimore County, Maryland (US Census).