Léon Jean Martinaud-Déplat (9 August 1899 – 5 October 1969) was a French lawyer and Radical politician who was a deputy in 1932–36 and in 1951–56.
He was Minister of Justice in 1952–53 and then Minister of the Interior in 1953–54.
He was violently anti-communist, and was opposed to granting autonomy or independence of the North African colonies.
His hard-line views caused him to be expelled from his party in 1955, and he failed to be reelected the next year.