The 12th Cannes Film Festival was held from 30 April to 15 May 1959. The Palme d'Or went to the Orfeu Negro by Marcel Camus. The festival opened with Les Quatre Cents Coups, directed by François Truffaut and closed with The Diary of Anne Frank, directed by George Stevens.

The Palme d'Or is the highest prize awarded at the Cannes Film Festival. It was introduced in 1955 by the festival's organizing committee. Previously, from 1939 to 1954, the festival's highest prize was the Grand Prix du Festival International du Film. In 1964, the Palme d'Or was replaced again by the Grand Prix, before being reintroduced in 1975.