Mahaney is a surname. Notable people with the surname include:
Aidan Mahaney (born 2003), American college basketball player C. J. Mahaney (born 1953), American religious leader Hilary Mahaney (1902–1969), American football player and coach Jack Mahaney (1844–?), American criminal Kevin Mahaney (born 1962) American real estate developer and sailor