Pierce Mason Butler (April 11, 1798 – August 20, 1847) was an American soldier and statesman who served as the 56th Governor of South Carolina from 1836 to 1838. He was killed while serving as colonel of the Palmetto Regiment at the Battle of Churubusco, during the Mexican-American War.Born in Edgefield County, South Carolina, Butler was a son of William Butler (1759–1821) and a brother of Andrew Pickens Butler and William Butler, Jr., all of whom served in the United States Congress.