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 26 Standard ZIP Codes and 3 PO Box ZIP Codes. Data Updated October 2, 2024
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.
| ZIP Code | ZIP Code City/Town | ZIP Code Type | |||
|---|---|---|---|---|---|
| Annapolis Junction | Standard | |||
| Laurel | Standard | |||
| Fulton | Standard | |||
| Savage | Standard | |||
| Highland | Standard | |||
| Jessup | Standard | |||
| Brookeville | Standard | |||
| Clarksville | Standard | |||
| Dayton | Standard | |||
| Ellicott City | PO Box | |||
| Ellicott City | Standard | |||
| Ellicott City | Standard | |||
| Columbia | Standard | |||
| Columbia | Standard | |||
| Columbia | Standard | |||
| Elkridge | Standard | |||
| Hanover | Standard | |||
| Marriottsville | Standard | |||
| Simpsonville | PO Box | |||
| Woodstock | Standard | |||
| Catonsville | Standard | |||
| Cooksville | Standard | |||
| Glenelg | Standard | |||
| Glenwood | Standard | |||
| Lisbon | PO Box | |||
| Mount Airy | Standard | |||
| Sykesville | Standard | |||
| West Friendship | Standard | |||
| Woodbine | Standard |