Boutwell died in Groton on February 27, 1905, and is buried at Groton Cemetery.Commemorative Exercises, p. 2 He was memorialized in a major celebration at Faneuil Hall, Boston, on April 18, 1905. His house in the center of Groton, built in 1851 while he was governor, was given to the Groton Historical Society by his daughter, Georgianna. It now serves as the society's headquarters and is open in the summer as a museum. It is listed on the National Register of Historic Places as the Gov. George S. Boutwell House.
