Francesco Barbaro (May 13, 1927 – November 1, 2018), also known as U'Castanu, was a boss of the 'Ndrangheta, a Mafia-type criminal organisation based in Calabria, Italy.
Born in Platì, he was the head of the Barbaro 'ndrina.
He was known as the king of kidnapping in the 1980s.
He became a member of Camera di Controllo, a provincial commission of the 'Ndrangheta formed at the end of the Second 'Ndrangheta war in September 1991, to avoid further internal conflicts.