Belknap County Post Office

Find Belknap County New Hampshire 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.


Alton Bay Post Office 5 Mount Major Highway Alton NH 03810 603-875-6800


Alton Post Office 9 School Street Alton NH 03809 603-875-6411

Barnstead Post Office 335 Parade Road Barnstead NH 03218 603-435-8853

Belmont Post Office 24 Post Office Rd Belmont NH 03220 603-267-6571

Center Barnstead Post Office 55 South Barnstead Road Barnstead NH 03218 603-269-4911

Gilmanton Iron Works Post Office 5 Elm Street Gilmanton NH 03837 603-364-7820

Gilmanton Post Office 365 Route 140 Gilmanton NH 03237 603-267-8545

Laconia Post Office 33 Church Street Laconia NH 03246 603-524-6271

Lakeport Post Office 34 Clinton Street Laconia NH 03246 603-524-5508

Lochmere Post Office 60 Silver Lake Road Tilton NH 03276 603-524-4723

Meredith Post Office 76 Main Street Meredith NH 03253 603-279-6242

New Hampton Post Office 15 Route 132 New Hampton NH 03256 603-744-2108

Sanbornton Post Office 542 Sanborn Road Sanbornton NH 03269 603-286-3335

Tilton Post Office 66 East Main Street Tilton NH 03276 603-286-4592

US Post Office 365 New Hampshire 140 Gilmanton NH 03237 603-267-8545

Weirs Beach Post Office 36 Endicott Street East Laconia NH 03246 603-366-4424

Winnisquam Post Office 969 Laconia Road Tilton NH 03276 603-524-3317

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.