William Arvis "Dollar Bill" Blakley (November 17, 1898 – January 5, 1976) was an American senator and businessman from the State of Texas.
He served two incomplete terms as Senator, the first in 1957, the second in 1961.
He was part of the conservative wing of the Texas Democratic Party and is remembered for running against liberal Democrat Ralph Yarborough in the 1958 election and losing to Republican John Tower in the 1961 special election, yielding the first Republican senator from Texas since Reconstruction.