Barq's is an American brand of root beer created by Edward Barq and bottled since the beginning of the 20th century. It is owned by the Coca-Cola Company. It was known as "Barq's Famous Olde Tyme Root Beer" until 2012. Some of its formulations contain caffeine.

Root beer is a sweet North American soft drink traditionally made using the root bark of the sassafras tree Sassafras albidum or the vine of Smilax ornata as the primary flavor. Root beer is typically, but not exclusively, non-alcoholic, caffeine-free, sweet, and carbonated. Like cola, it usually has a thick and foamy head. A common use is to add vanilla ice cream to make a root beer float.