Baltimore County Post Office

Find Baltimore County Maryland post offices and USPS mailing boxes. Post offices provide information on bulk mail services, domestic mail delivery, international shipping, change of address, mail forwarding, PO boxes, and passport services.


Baldwin Post Office 13516 Long Green Pike Baldwin MD 21013 410-592-7538


Boring Post Office 14707 Old Hanover Road Reisterstown MD 21136 410-429-4474

Brooklandville Post Office 10807 Falls Road Lutherville MD 21093 410-321-0593

Butler Post Office 14921 Falls Road Butler MD 21023 410-472-0310

Catonsville Post Office 1001 Frederick Road Catonsville MD 21228 410-869-7204

Chase Post Office 12404 Eastern Avenue Middle River MD 21220 410-335-6283

Cockeysville Hunt Valley Post Office 115 Wight Avenue Cockeysville MD 21030 410-771-0783

Dundalk Sparrows Point Post Office 44 Shipping Place Dundalk MD 21222 410-284-4326

Essex Post Office 444 Maryland Avenue Essex MD 21221 410-687-6366

Fork Post Office 12544 Harford Road Hydes MD 21082 410-592-7279

Fort Howard Post Office 9200 Howard Avenue Edgemere MD 21052 410-477-2105

Freeland Post Office 21600 New Freedom Road Freeland MD 21053 410-357-9969

Glen Arm Post Office 12112 Long Green Pike Glen Arm MD 21057 410-592-9658

Glyndon Post Office 2 Railroad Avenue Glyndon MD 21071 410-517-3184

Gwynn Oak Post Office 6101 Liberty Road Lochearn MD 21207 410-944-2435

Halethorpe Post Office 6 Waelchli Avenue Halethorpe MD 21227 410-242-1483

Hydes Post Office 5237 Hydes Road Hydes MD 21082 410-592-6294

Kingsville Post Office 7363 Sunshine Avenue Kingsville MD 21087 410-592-3503

Loch Raven Post Office 808 Gleneagles Court Towson MD 21286 410-828-1430

Lutherville Timonium Post Office 9603 Deereco Road Lutherville MD 21093 410-252-0741

What is a Post Office?

A post office is a local branch of the United States Postal Service, where mail is received and dispatched to individuals and businesses in a given community. A post office usually has postal clerks who receive and process mail, and it's also the place from which mail carriers pick up mail they deliver on their local routes. The office handles USPS business, including mail and package sorting, delivery and forwarding, sales of stamps and other postal supplies, change-of-address requests, and other administrative functions.

In some small communities, the local post office may be located within a commercial business. In communities both large and small, a post office may serve as a local passport office at which passport applications are received and undergo initial processing.