List of Sonic Stores in Lampasas, TX Outlet Note Regular Brands Sonic Texas Lampasas 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 - Lampasas 702 S Key Ave (512) 556-6834 People Also Viewed