List of Sonic Stores in Mount Vernon, MO Outlet Note Regular Brands Sonic Missouri Mount Vernon Rating 4.5 based on 91 votes Official Website https://www.sonicdrivein.com/ Products Snacks Ice Cream Drinks Chicken Hot Dogs Burgers NameAddressPhone Name/Address/Phone Sonic outlet - Mount Vernon 635 E Mount Vernon Blvd (417) 466-7359 People Also Viewed