Krystal is a hamburger restaurant chain in the Southeastern United States. It is known for small, square hamburgers, and unique breakfast food like the "Scrambler," a mixture of eggs, sausage and other items such as pancakes or grits.

Founded October 24, 1932, in Chattanooga, in the first years of the Great Depression, entrepreneur Rody Davenport Jr. and partner J. Glenn Sherrill theorized that even in a severe economic upheaval, "People would patronize a restaurant that was kept spotlessly clean, where they could get a good meal with courteous service at the lowest possible price." Krystal is the second-oldest hamburger chain in the United States (the oldest being White Castle)[1] and the oldest in the South. Davenport and Sherrill set up the first Krystal at the corner of Seventh and Cherry streets in Chattanooga. While the building still stands, the original Krystal restaurant is no longer in operation. The oldest Krystal still in operation is located on Cherokee Boulevard in Chattanooga's Northshore District.

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