There are 44 zip codes in Baltimore County, Maryland. The most populated is 21234, located in Parkville. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
2123466,095Parkville
2122260,013Dundalk
2111758,516Owings Mills
2120751,765Gwynn Oak
2122850,268Catonsville
2122143,822Essex
2122042,652Middle River
2124439,501Windsor Mill
2109338,961Lutherville Timonium
2123638,632Nottingham
2120837,319Pikesville
2122735,052Halethorpe
2113635,038Reisterstown
2113332,070Randallstown
2123730,983Rosedale
2103025,133Cockeysville
2128621,142Towson
2120420,188Towson
2112815,934Perry Hall
212199,605Sparrows Point
211317,722Phoenix
211207,319Parkton
211637,222Woodstock
211526,517Sparks Glencoe
210875,597Kingsville
210135,382Baldwin
211114,838Monkton
210574,530Glen Arm
212524,456Baltimore
211624,322White Marsh
211553,063Upperco
210533,051Freeland
212502,959Baltimore
21082694Hydes
21153676Stevenson
21071526Glyndon
21052438Fort Howard
21156362Upper Falls
21251319Baltimore
21051113Fork
2102368Butler
2110540Maryland Line
2103126Hunt Valley
2128510Baltimore
showing: 44 rows

Zip Codes in Baltimore County, Maryland by Population (2024)