William Lindsay (July 15, 1840 – December 6, 1927) was a member of the Wisconsin State Assembly.
Lindsay was born on July 15, 1840, in Dundee, Scotland. He would later move to Trenton, Dodge County, Wisconsin. After living for a time in Olmsted County, Minnesota, he moved to Milwaukee, Wisconsin, in 1874.
Lindsay was elected to the Assembly in 1882. Previously, he was Chairman of the Olmsted County Board in 1866. He was a Republican.