US Post Office

Address

126 Main St, Newmarket, NH 03857

Phone

(800) 275-8777

Website

tools.usps.com/find-location.htm?location=1375003&y_source=1_MzM4OTcxOC00NDAtbG9jYXRpb24ud2Vic2l0ZQ==

Last checked September 23, 2026. Call ahead to confirm hours.

Listing details from Overture Maps open data.