Island of Happy Days

The Island of Happy Days is a historic estate located on Stout Island in Red Cedar Lake, Barron County, Wisconsin. Built from 1909 to 1911, the estate was a summer home for the family of Frank Deming Stout, heir to the Knapp, Stout & Co. fortune. The estate was designed by Arthur Heun in a rustic style resembling Adirondack resorts. Stout and his family visited the home until Stout's death in 1927; he called it "the dearest place on earth". The home is now a resort called Stout's Island Lodge.

The Island of Happy Days was added to the National Register of Historic Places on February 24, 1995.