William F. Quick, Sr., (July 31, 1885 – December 12, 1966) was an American machinist, lawyer, and Socialist politician in Milwaukee, Wisconsin. He was the Socialist Party nominee for Governor of Wisconsin in 1924 and served one term (1923–1926) in the Wisconsin State Senate, representing the Milwaukee-based 7th District. After leaving the senate, he served as a civil court judge and city attorney in Milwaukee. He is not to be confused with William F. Quick (born 1909) who served two terms as Sergeant at Arms of the Wisconsin State Assembly in the 1970s.