Gianfranco Leoncini (; 25 September 1939 â 5 April 2019) was an Italian footballer who played as a midfielder.
During his club career, Leoncini played for Juventus, Atalanta and Mantova. He won three Serie A titles with Juventus.
At international level, Leoncini earned 2 caps for the Italy national football team in 1966, and participated in the 1966 FIFA World Cup.