Caroline County Post Office

Find Caroline 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.


Bethlehem Post Office 22015 Dover Bridge Road Preston MD 21655 410-673-7024


Denton Post Office 503 Market Street Denton MD 21629 410-479-2363

Federalsburg Post Office 122 Morris Avenue Federalsburg MD 21632 410-754-9091

Goldsboro Post Office 507 Oldtown Road Goldsboro MD 21636 410-482-2134

Greensboro Post Office 202 West Sunset Avenue Greensboro MD 21639 410-482-8366

Henderson Post Office 321 Bee Tree Road Henderson MD 21640 410-482-8466

Hillsboro Post Office 22043 Main Street Hillsboro MD 21641 410-364-5588

Marydel Post Office 114 Halltown Road Marydel MD 21649 410-482-8081

Preston Post Office 301 Main Street Preston MD 21655 410-673-2166

Ridgely Post Office 502 Maryland Avenue Ridgely MD 21660 410-634-2622

Templeville Post Office 3711 Barclay Road Marydel MD 21649 410-482-2474

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.