Klaus Dibiasi (born October 6, 1947) is a former diver from Italy, who competed in four consecutive Summer Olympics for his native country, starting in 1964. He dominated the platform event from the late 1960s to the mid-1970s, winning a total number of three Olympic gold medals.
Dibiasi won a silver medal in platform diving at the 1964 Summer Olympics, and went on to win gold in the same event at the next three Games (1968, 1972, and 1976). Dibiasi is the only Olympic diver to have won three successive gold medals, and he is the only diver to have won medals at four Summer Olympics. A silver in the springboard in 1964 gave him a record total of five Olympic medals. He also excelled at the first two FINA World Aquatic Championships (1973 and 1975), winning four medals.
Dibiasi was born in Solbad Hall, Austria from Italian parents, who returned to Italy when he was a child. He was the first Italian to become an Olympic champion in a diving event. Dibiasi was coached by his father, Carlo, a former Italian champion (1933–1936) and a competitor at the 1936 Summer Olympics in Berlin, who finished 10th on the platform. Klaus Dibiasi also later coached the Italian diving team.