21778 Post Office

Find 21778 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.


Rocky Ridge Post Office 13516 Motters Station Road Rocky Ridge MD 21778 301-271-4920


New Midway Post Office 12048 Woodsboro Pike Keymar MD 21757 3.9 miles from 21778 301-845-2145

Ladiesburg Post Office 12509 Woodsboro Pike Keymar MD 21757 4.4 miles from 21778 301-845-2956

Thurmont Post Office 110 Water Street Thurmont MD 21788 4.4 miles from 21778 301-271-2226

Keymar Post Office 6747 Middleburg Road Keymar MD 21757 4.9 miles from 21778 410-775-2262

Emmitsburg Post Office 305 South Seton Avenue Emmitsburg MD 21727 5.9 miles from 21778 301-447-2655

Woodsboro Post Office 602 South Main Street Woodsboro MD 21798 6.0 miles from 21778 301-845-8408

Union Bridge Post Office 111 Penrose Street Union Bridge MD 21791 8.6 miles from 21778 410-775-2510

Taneytown Post Office 13 Middle Street Taneytown MD 21787 8.7 miles from 21778 410-756-6411

Walkersville Post Office 7 East Frederick Street Walkersville MD 21793 9.3 miles from 21778 301-845-8342

Sabillasville Post Office 17235 Sabillasville Road Sabillasville MD 21780 9.5 miles from 21778 301-241-3875

Libertytown Post Office 11941 Main Street Frederick MD 21701 10.0 miles from 21778 301-898-7156

Cascade Post Office 25208 Military Road Highfield-Cascade MD 21719 10.7 miles from 21778 301-241-3403

Blue Ridge Summit Post Office 14959 Buchanan Trail East Blue Ridge Summit PA 17214 11.1 miles from 21778 717-794-2335

Fairfield Post Office 6 Carrolls Tract Road Fairfield PA 17320 12.3 miles from 21778 717-642-5198

New Windsor Post Office 204 Maple Avenue New Windsor MD 21776 12.9 miles from 21778 410-635-2151

Smithsburg Post Office 43 Grove Lane Smithsburg MD 21783 13.1 miles from 21778 301-824-2828

Rouzerville Post Office 11738 Pen Mar Road Rouzerville PA 17250 13.4 miles from 21778 717-762-7050

College Estates Post Office 1301 West 7th Street Frederick MD 21702 13.7 miles from 21778 301-662-6115

Cavetown Post Office 22509 Cavetown Church Road Smithsburg MD 21783 13.8 miles from 21778 301-824-5230

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.