William Folger Nickle KC (December 31, 1869 - November 15, 1957) was a Canadian politician who served both as a member of the House of Commons of Canada and in the Ontario legislature where he rose to the position of Attorney-General of Ontario. He is best known for the Nickle Resolution that ended the practice of knighthoods and peerages being awarded to Canadians. William McAdam Nickle, a son from his first marriage, went on to serve in the Ontario cabinet.