William McChesney Martin Jr. was the 9th chairman of the Federal Reserve, holding the position from 1951 to 1970, making him the longest-serving chairman in the institution's history. He was initially nominated by President Harry S.
Truman and subsequently reappointed by four of Truman's successors. Martin's family had a deep connection to the Federal Reserve; his father helped draft the Federal Reserve Act in 1913 and later served as a governor and president of the Federal Reserve Bank of St.