Costante Degan (March 12, 1930 – July 1, 1988) was an Italian Christian Democrat politician. He was minister of health (1983–1986) in the Government of Italy. He served in the cabinet of Prime Minister Bettino Craxi. He was Mayor of Venice (1988). He served in the Chamber of Deputies of Italy in Legislature IV (1963-1968), Legislature V (1968-1972), Legislature VI (1972-1976), Legislature VII (1976-1979) and Legislature VIII (1979-1983). He served in the Senate of Italy in Legislature IX (1983-1987) and Legislature X (1987-1992).