Carroll County Post Office

Find Carroll 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.


Finksburg Post Office 2999 Dede Road Finksburg MD 21048 410-526-0420


Hampstead Post Office 4005 Houck Avenue Hampstead MD 21074 410-374-3486

Keymar Post Office 6747 Middleburg Road Keymar MD 21757 410-775-2262

Ladiesburg Post Office 12509 Woodsboro Pike Keymar MD 21757 301-845-2956

Manchester Post Office 3100 Westminster Street Manchester MD 21102 410-374-0586

Mount Airy Post Office 505 Windy Knoll Drive Mount Airy MD 21771 301-829-1199

New Midway Post Office 12048 Woodsboro Pike Keymar MD 21757 301-845-2145

New Windsor Post Office 204 Maple Avenue New Windsor MD 21776 410-635-2151

Sykesville Post Office 1363 Progress Way Sykesville MD 21784 410-795-0350

Taneytown Post Office 13 Middle Street Taneytown MD 21787 410-756-6411

Union Bridge Post Office 111 Penrose Street Union Bridge MD 21791 410-775-2510

Westminster Post Office 345 Woodward Drive Westminster MD 21157 410-848-4805

Woodbine Post Office 7623 Woodbine Road Woodbine MD 21797 410-795-9596

What Change of Address options are available?

Customers can request a temporary or permanent Change of Address either online or in person at the Post Office using PS Form 3575. The online application for Change of Address has a $1.00 identity validation fee.

Is it possible to insure mail and items sent via the USPS?

Yes. Standard mail can be insured for up to $5,000 for an additional fee. Registered mail items can be insured for up to $50,000.

What is the USPS Office of Inspector General?

The Office of Inspector General (OIG) is a division within the USPS responsible for ensuring the integrity and accountability of the postal service. It conducts investigations to safeguard the postal system and performs audits and reviews.