Quaglia is an Italian surname. Notable people with the surname include:
Alberto Quaglia (active early 20th century), Italian soccer coachFernando Quaglia (active early 19th century), Italian painter of portrait miniaturesFranca Quaglia, Italian women's downhill skierGerolamo Quaglia (1902–1985), Italian wrestler and Olympic medalist in Greco-Roman wrestlingGiovanni Quaglia, founder of the Italian company SO.RI.MA. (Society for Maritime Recovery)Hélio Quaglia Barbosa (1941–2008), Brazilian judgeLéonhard Quaglia, French ice hockey player at the 1920 and 1928 Winter OlympicsMarco Quaglia, Italian actor (Gasoline, The Best Day of My Life)Martín Quaglia, husband of Colombian television actress Ana María OrozcoMassimo Quaglia, Italian film editor (The Star Maker, Malèna, La sconosciuta)Roberto Quaglia (born 1962), Italian science fiction writer