John William McCormack

John William McCormack served as a Representative from Massachusetts in the United States Congress from 1927 to 1971. A member of the Democratic Party, John William McCormack contributed to the legislative process during 22 terms in office.

John William McCormack’s service in Congress occurred during a significant period in American history. As a member of the House of Representatives, John William McCormack participated in the democratic process and represented the interests of constituents.

John William McCormack (December 21, 1891 – November 22, 1980) was an American politician from Boston, Massachusetts who served as the 45th speaker of the United States House of Representatives from 1962 until his retirement in 1971. McCormack served in the United States Army during World War I, and afterwards in the Massachusetts State Senate before winning election to the United States House of Representatives. McCormack’s congressional career was highlighted by his support for the New Deal measures undertaken to combat the Great Depression, U.S. involvement in World War II, and support for the Great Society programs of the 1960s, including civil rights, education, and health care for the elderly. A staunch anti-communist, McCormack supported U.S. involvement in the Vietnam War. His support for the war and the seniority system in Congress caused increasing numbers of younger members to challenge his leadership; McCormack survived a 1969 contest with Mo Udall for the Speakership. He did not run for reelection to his House seat in 1970, and retired to his home in Boston. He later resided at a Dedham nursing home, where he died in 1980. At 42 years and 58 days, as of 2025, McCormack’s service in the U.S. House ranks 19th in terms of uninterrupted time and 21st in total. He is the longest-serving member of the U.S. House in Massachusetts history.