Klaus Graf is a German professional racing driver. He is the son of rally driver Peter Graf. He lives in the United States while competing in the American Le Mans Series. He resulted LMP1 class champion in 2012, and runner-up in 2010 and 2011.

The American Le Mans Series (ALMS) was a sports car racing series based in the United States and Canada. It consisted of a series of endurance and sprint races, and was created in the spirit of the 24 Hours of Le Mans.