Mark Benson Madsen (born May 8, 1963) is an American politician and attorney from Utah.
A Libertarian, he is a former member of the Utah State Senate, where he represented the state's 13th senate district in Utah, and Tooele Counties including the city of Lehi.
Madsen is the grandson of Ezra Taft Benson, Secretary of Agriculture under President Eisenhower.