Howard County Maryland ZIP Codes - Map and Full List

Howard County Maryland is covered by a total of 29 ZIP Codes. There are 11 ZIP Codes in Howard County that extend into adjacent counties (Anne Arundel County, Baltimore County, Carroll County, Frederick County, and Montgomery County). Of the ZIP codes within or partially within Howard County there are 25 Standard ZIP Codes and 3 PO Box ZIP Codes.

Map List Related

Howard County Maryland ZIP Code Map

Click on the ZIP Codes in the interactive map to view more information. The map control in the upper right corner can be used to toggle map layers on and off. The red outline is the border of Howard County and can be turned on and off. Each type of postal code can also be turned on and off.

List of ZIP Codes in Howard County

ZIP CodeZIP Code City/TownZIP Code Type
ZIP Code 20701
Annapolis JunctionStandard
ZIP Code 20723
LaurelStandard
ZIP Code 20759
FultonStandard
ZIP Code 20763
SavageStandard
ZIP Code 20777
HighlandStandard
ZIP Code 20794
JessupStandard
ZIP Code 20833
BrookevilleStandard
ZIP Code 21029
ClarksvilleStandard
ZIP Code 21036
DaytonStandard
ZIP Code 21041
Ellicott CityPO Box
ZIP Code 21042
Ellicott CityStandard
ZIP Code 21043
Ellicott CityStandard
ZIP Code 21044
ColumbiaStandard
ZIP Code 21045
ColumbiaStandard
ZIP Code 21046
ColumbiaStandard
ZIP Code 21075
ElkridgeStandard
ZIP Code 21076
HanoverStandard
ZIP Code 21104
MarriottsvilleStandard
ZIP Code 21150
SimpsonvillePO Box
ZIP Code 21163
WoodstockStandard
ZIP Code 21228
CatonsvilleStandard
ZIP Code 21723
CooksvilleStandard
ZIP Code 21737
GlenelgStandard
ZIP Code 21738
GlenwoodStandard
ZIP Code 21765
LisbonPO Box
ZIP Code 21771
Mount AiryStandard
ZIP Code 21784
SykesvilleStandard
ZIP Code 21794
West FriendshipStandard
ZIP Code 21797
WoodbineStandard

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