William McNulty Brodhead (born September 12, 1941) is a politician from the U.S. state of Michigan.

Brodhead was born in Cleveland, Ohio and attended elementary and secondary schools in Cleveland. He received a B.A. from Wayne State University, Detroit, Michigan, in 1965 and a J.D. from the University of Michigan Law School, Ann Arbor, in 1967. He was admitted to the Michigan Bar in 1968 and commenced practice in Detroit. He was elected to Michigan House of Representatives, 1970 and was reelected in 1972. He was a delegate to Michigan State Democratic conventions, 1968-1974.

In 1972, Martha W. Griffiths , Democratic incumbent for Michigan's 17th District to the United States House of Representatives was not a candidate for renomination. Brodhead won nomination as the Democratic candidate and was elected to the Ninety-fourth and to the three succeeding Congresses, serving from January 3, 1975 to January 3, 1983. He was not a candidate for reelection in 1982 and resumed the practice of law.

In 1994, he was an unnsucessful candidate for U.S. Senator, losing in the primary to Bob Carr, who went on to lose in the general election to Spencer Abraham. Broadhead is a resident of Detroit and Washington, D.C. and worked with the law firm of Plunkett & Cooney until 2003.