Imogen Florence LaChance (née Hanscom; November 22, 1853 – August 1938) was an American social reformer active in the temperance movement for 60 years.

Four years later, her mother, Elizabeth (nee Pickering; 1830-1916), married Professor William Owen Butler (1829-1913), principal of one of the schools of Sheboygan at that time.

In 1887, they moved to Merrill, Wisconsin, and there she organized and superintended Senior and Junior Loyal Temperance Legion as well as serving as president of the local W.C.T.U.

Under her leadership, the work prospered, LaChance being a firm believer in the principles of temperance and the final prohibition of the liquor traffic.

[1] In failing health the last two years of her life, Imogen LaChance died at her daughter's home in California, August 1938.