The Coppa Italia 1965/66 , the soccer cup competition for club teams in Italy for the 1965/66 season, was won by Fiorentina . The Fiorentina prevailed in the final against US Catanzaro and won the Coppa Italia for the third time. Coach Giuseppe Chiappella's team won 2-1 after extra time and succeeded Juventus Turin , who had prevailed against Inter Milan last year, but were eliminated in the semi-finals this time.
As the Italian cup winner in 1965/66, Fiorentina qualified for the European Cup Winners' Cup of the following year, where the end came in the first round against the Hungarian representative Rába ETO Győr .