Colonel William M. Winn was a charter member of the Juneau Men's Igloo.

William Winn was born in February 1855 in Wiota, Wisconsin. He came to Alaska in 1889, where he worked as a druggist.

In Wisconsin, an unknown partner bore him three sons: John E. Winn, born in December 1882; and twins Milton Winn and Grover C. Winn, born in January 1886.

He married Sarah Anna Winn on December 10, 1892, in Woodford, Lafayette County, Wisconsin. They came to Juneau in 1893. Their son, Burdette A. Winn, was born on March 21, 1896, in Juneau.

William Winn died on April 5, 1914, at the age of 66.

1910 U.S. Federal Population Census; Douglas Island News, April 8, 1914; Daily Alaska Empire, April 5, 1934.