William Power (February 21, 1849 – December 11, 1920) was a Canadian politician. Born in the parish of Sillery, Canada East, the son of William Power and Bridgit Fitzgerald, both Irish, Power was educated at the Commercial Academy of Quebec. A lumber merchant, he was elected to the House of Commons of Canada for Quebec West in a 1902 by-election, after the death of the sitting MP, Richard Reid Dobell. A Liberal, he was re-elected in 1904 but was defeated in 1908. He was elected again in 1911 but did not run in 1917.