William Small (October 5, 1824 - February 9, 1900) was a member of the Wisconsin State Assembly.
Small was born in Perthshire, Scotland.[1] On November 27, 1856, he married Margaret Marshall (1819–1900). They had a son. He was a member of the Assembly in 1880.[2] Other positions he held include Assessor of Lisbon, Waukesha County, Wisconsin. He was a Republican.