The Town of Linn was established January 23,1844 ( four years before Wisconsin became a state). It is named for Dr. Lewis Field Linn of Missouri, a Federal Senator, who died in 1843. John Powers, a native of Maine, built the first house in Linn in 1837. His log cabin was located at the East end of the lake. The 1880 Federal census records the Town population as 823. The 2005 resident population was 2,318.
The first residents of this area were the Potawatomi, who named the lake "Kish-wau-kee-to" which means "clear water". Big Foot High School in Walworth is named in honor of their Chief. Potawatomi names are still seen on many road signs.