Scalia is an Italian surname. Notable people with the surname include:
Antonin Scalia (1936–2016), American justice
Daniela Scalia, Italian television journalist and presenter
Eugene Scalia (born 1963), American lawyer
Giancarlo Scalia, Canadian pianist and composer
Jack Scalia (born 1950), American actor
Jimmy Scalia (born 1960), American record producer
Liz Scalia, British-Italian cyclist
Pietro Scalia (born 1960), Italian-American film editor