List of US Post Office Stores in North Myrtle Beach, SC Outlet Note Regular Brands US Post Office South Carolina North Myrtle Beach Rating 4.5 based on 76 votes Official Website https://www.usps.com/ Products Postal Service NameAddressPhone Name/Address/Phone US Post Office outlet - North Myrtle Beach 621 6th Ave S (843) 272-5864 US Post Office outlet - North Myrtle Beach 308 Sea Mountain Hwy (843) 663-6955 People Also Viewed