List of US Post Office Stores in Mountlake Terrace, WA Outlet Note Regular Brands US Post Office Washington Mountlake Terrace Rating 4.5 based on 76 votes Official Website https://www.usps.com/ Products Postal Service NameAddressPhone Name/Address/Phone US Post Office outlet - Mountlake Terrace 23210 57th Ave W (425) 778-0429 People Also Viewed