List of US Post Office Stores in Chatham, MA Outlet Note Regular Brands US Post Office Massachusetts Chatham Rating 4.5 based on 76 votes Official Website https://www.usps.com/ Products Postal Service NameAddressPhone Name/Address/Phone US Post Office outlet - Chatham 200 Orleans Rd (508) 945-5560 US Post Office outlet - Chatham 802 Main St (508) 945-6054 US Post Office outlet - Chatham 1671 Main St, #E (508) 945-7231 People Also Viewed