21771 Post Office

Find 21771 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.


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


Woodbine Post Office 7623 Woodbine Road Woodbine MD 21797 6.0 miles from 21771 410-795-9596

Monrovia Post Office 4411 Green Valley Road Monrovia MD 21770 6.2 miles from 21771 301-865-5432

New Market Post Office 168 West Main Street New Market MD 21774 6.4 miles from 21771 301-865-3333

Lisbon Post Office 1280 Hopkins Alley Lisbon MD 21765 6.5 miles from 21771 410-489-7177

Damascus Post Office 26400 Woodfield Road Damascus MD 20872 7.4 miles from 21771 301-253-3781

Libertytown Post Office 11941 Main Street Frederick MD 21701 7.7 miles from 21771 301-898-7156

Glenwood Post Office 3000 Route 97 Glenwood MD 21738 10.3 miles from 21771 410-489-4451

New Windsor Post Office 204 Maple Avenue New Windsor MD 21776 10.6 miles from 21771 410-635-2151

Sykesville Post Office 1363 Progress Way Sykesville MD 21784 11.6 miles from 21771 410-795-0350

Walkersville Post Office 7 East Frederick Street Walkersville MD 21793 11.6 miles from 21771 301-845-8342

Union Bridge Post Office 111 Penrose Street Union Bridge MD 21791 11.9 miles from 21771 410-775-2510

Woodsboro Post Office 602 South Main Street Woodsboro MD 21798 12.3 miles from 21771 301-845-8408

West Friendship Post Office 12800 Highway 144 West Friendship MD 21794 12.8 miles from 21771 410-442-1790

Frederick Post Office 201 East Patrick Street Frederick MD 21701 13.0 miles from 21771 301-662-2131

Glenelg Post Office 3900 Ten Oaks Road Glenelg MD 21737 13.0 miles from 21771 410-531-5016

Clarksburg Post Office 22505 Gateway Center Drive Clarksburg MD 20871 13.1 miles from 21771 301-540-0856

Laytonsville Post Office 6830 Olney Laytonsville Road Laytonsville MD 20882 13.1 miles from 21771 301-208-3736

Brookeville Post Office 22311 Georgia Avenue Brookeville MD 20833 13.2 miles from 21771 301-260-2975

Ladiesburg Post Office 12509 Woodsboro Pike Keymar MD 21757 13.7 miles from 21771 301-845-2956

About Post Offices

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.