List of Whataburger Stores in San Marcos, TX Outlet Note Regular Brands Whataburger Texas San Marcos Rating 5 based on 64 votes Products Fast Food Hamburgers Biscuit NameAddressPhone Name/Address/Phone Whataburger outlet - San Marcos 1004 Tx-123 (512) 754-7375 Whataburger outlet - San Marcos 4040 Ih-35 S (512) 353-0567 People Also Viewed