Lake Underwood (July 4, 1926 – September 12, 2008) was an American entrepreneur who competed as a champion in the racing of prototype automobiles and motorcycles. He was a master mechanic who, although high performance fuel delivery and carburetor design and mechanics were his specialties, also invented automobile improvements, especially in electronics for German automobiles. He was an active member of many racing, road racing, and automobile related clubs, some of which he helped to found. He served as president for some of them.