Di Maio or DiMaio is an Italian surname. Notable people with the surname include:
Connor Dimaio (born 1996), English footballer John DiMaio (born 1955), American politician Luigi Di Maio (born 1986), Italian politician Mariasole Di Maio (born 2001), Italian actress Rob DiMaio (born 1968), Canadian ice hockey player Roberto Di Maio (born 1982), Italian-born Sammarinese footballer Vincent Di Maio (1941–2022), American pathologist