Samuel Mark Aanestad (July 16, 1946 – May 6, 2018) was an American physician, surgeon, and politician. A Republican, he served in the California State Assembly from the 3rd District from 1998 to 2002 and a member of the California State Senate from the 4th district from 2002 to 2010. He was an unsuccessful candidate for California's 1st Congressional District, which was being vacated by retiring Congressman Wally Herger.