William Thompson Innis (June 27, 1826 – November 16, 1901) was an American farmer and politician.
Born in Newburgh, New York, Innis moved to Wisconsin in 1849.
Innis was a Republican, and served as chairman of the Rosendale Town Board.
In 1901, Innis died at his daughter's house in Pickett, Wisconsin.
This article about a Republican Party member of the Wisconsin State Assembly born in the 1820s is a stub.