McKenney or McKenny is a surname. Notable people with the surname include:
Charles McKenny, president of Central State Normal School (now Central Michigan University), Milwaukee Devon McKenney, American soccer player Don McKenney, Canadian ice hockey player Eileen McKenney, sister of author Ruth McKenney Henry William McKenney, Canadian politician James Felix McKenney, American writer, director, producer and actor Jim McKenny, former ice hockey defenceman and reporter Joe McKenney, Boston College footballer Marjorie McKenney, American military machinist Ruth McKenney, American author Stewart McKenny, Australian comic book artist Thomas L. McKenney, U.S. Superintendent of Indian Trade Thomas McKenny Hughes, Welsh geologist Todd McKenney, Australian entertainer Todd McKenney (Ohio politician) William Robertson McKenney, U.S. Representative from Virginia