William A. Lawrence (26 March 1822 - 12 August 1890) was a member of the Wisconsin State Assembly and the Wisconsin State Senate.^[1] He was elected to the Assembly in 1851. In 1862 and 1864, he was elected to the Senate from the 17th District. Other positions Lawrence held include Mayor of Janesville, Wisconsin and County Treasurer of Rock County, Wisconsin. He was a Republican.