List of US Post Office Stores in Wynnewood, OK Outlet Note Regular Brands US Post Office Oklahoma Wynnewood Rating 4.5 based on 76 votes Official Website https://www.usps.com/ Products Postal Service NameAddressPhone Name/Address/Phone US Post Office outlet - Wynnewood 115 E Robert S Kerr Blvd (405) 665-4235 People Also Viewed