Northumberland County Post Office

Find Northumberland County Pennsylvania 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.


Dalmatia Post Office 1878 George Street Dalmatia PA 17017 570-758-2154


Dewart Post Office 2037 Main Street Watsontown PA 17777 570-538-5959

Dornsife Post Office 123 Creek Rd Dornsife PA 17823 570-758-3844

Elysburg Post Office 5 West Roosevelt Avenue Elysburg PA 17824 570-672-2946

Herndon Post Office 127 Pottsville St Herndon PA 17830 570-758-9183

Kulpmont Post Office 901 Chestnut St Frnt Kulpmont PA 17834 570-373-1350

Locust Gap Post Office 274 Main St Locust Gap PA 17840 570-339-5173

Marion Heights Post Office 226 East North Street Marion Heights PA 17832 717-373-3930

Mc Ewensville Post Office 8 Potash Street McEwensville PA 17749 570-538-9341

Milton Post Office 29 North Front Street Milton PA 17847 570-742-7301

Montandon Post Office 97 Main Street Montandon PA 17850 570-524-9464

Mount Carmel Post Office 1 South Hickory Street Mount Carmel PA 17851 570-339-1300

Northumberland Post Office 75 Queen Street Northumberland PA 17857 570-473-3581

Paxinos Post Office 5317 Pennsylvania 61 Paxinos PA 17860 570-644-0253

Potts Grove Post Office 4365 State Rte 42 Potts Grove PA 17865 570-742-8244

Rebuck Post Office 1713 Schwaben Creek Rd Rebuck PA 17867 570-425-2585

Riverside Post Office 390 Dewart Street Riverside PA 17868 570-275-1047

Shamokin Post Office 201 East Independence Street Shamokin PA 17872 570-648-4686

Sunbury Post Office 135 North 3rd Street Sunbury PA 17801 570-286-7176

Trevorton Post Office 801 W Shamokin St Lowr Trevorton PA 17881 570-797-8482

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.