William Knight Boardman (February 3, 1915 – March 18, 1993) was a Republican Alaska legislator who served as Speaker of the Alaska House of Representatives from 1967 to 1968. Born in Iowa, Boardman was a resident of Ketchikan, Alaska. An insurance businessman, he served as a member of the Territorial House of Representatives from the 1st District from 1953 to 1954, and as an Alaskan alternate delegate to the 1956 Republican National Convention.