Harford County Post Office

Find Harford 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.


Aberdeen Post Office 30 West Bel Air Avenue Aberdeen MD 21001 410-272-1610


Aberdeen Proving Ground Post Office 4510 Boothby Hill Avenue Aberdeen Proving Ground MD 21005 410-272-2706

Abingdon Post Office 2945 Emmorton Road Abingdon MD 21009 410-569-4421

Bel Air Post Office 202 Blum Court Bel Air MD 21014 410-420-7544

Belcamp Post Office 4405 Pulaski Highway Belcamp MD 21017 410-272-3525

Benson Post Office 108 Connolly Road Fallston MD 21047 410-877-8325

Churchville Post Office 2931 Churchville Road Churchville MD 21028 410-734-9119

Darlington Post Office 1113 Main Street Darlington MD 21034 410-457-0461

Edgewood Post Office 2290 Hanson Road Edgewood MD 21040 410-676-9378

Fallston Post Office 2416 Watervale Road Fallston MD 21047 410-877-2846

Forest Hill Post Office 2329 Rock Spring Road Forest Hill MD 21050 410-838-0820

Gunpowder Post Office 4405 Austin Road Aberdeen Proving Ground MD 21010 410-676-1905

Havre De Grace Post Office 301 North Juniata Street Havre de Grace MD 21078 410-939-9507

Jarrettsville Post Office 3713 Federal Hill Road Jarrettsville MD 21084 410-692-0972

Joppa Post Office 906 Joppa Farm Road Joppa MD 21085 410-679-5395

Perryman Post Office 428 Michaelsville Road Perryman MD 21130 410-272-5712

Pylesville Post Office 3965 Ady Road Pylesville MD 21132 410-452-5597

Street Post Office 708 Highland Rd Rear Street MD 21154 410-836-1666

Whiteford Post Office 1508 Main Street Whiteford MD 21160 410-452-0526

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.