| Léon Noël | |
| Office: | President of the Constitutional Council |
| Term Start: | 5 March 1959 |
| Term End: | 5 March 1965 |
| Appointer: | Charles de Gaulle |
| Successor: | Gaston Palewski |
| Term Start2: | 1951 |
| Term End2: | 1955 |
| Term Start3: | 1935 |
| Term End3: | 1940 |
| Term Start4: | 1932 |
| Term End4: | 1935 |
| Term Start5: | 1930 |
| Term End5: | 1931 |
| Office6: | High Commissioner of the French Republic in Rhineland |
| Term Start6: | 1927 |
| Term End6: | 1930 |
| Birth Date: | 28 March 1888 |
| Birth Place: | Paris, France |
| Death Place: | Toucy, France |
| Nationality: | French |
| Alma Mater: | Paris Law Faculty |
| Profession: | Lawyer Diplomat |
| Signature: | Signature de Léon Noël - Archives nationales (France).png |
Léon Philippe Jules Arthur Noël (28 March 1888 - 6 August 1987) was a French diplomat, politician and historian.
He is the son of Jules Noël, conseiller d'Etat, and Cécile Burchard-Bélaváry. He received a Doctor of Laws in 1912 and then became Conseiller d'État. In 1927 he became Délégué Général of the High Commissioner of the French Republic in Rhineland.
He became Prefect of Haut-Rhin in 1930, Plenipotentiary Minister in Prague (1932–1935), and then French Ambassador to Poland (1935–1940).
He represented the French Minister of Foreign Affairs in the Second Armistice at Compiègne on 22 June 1940. He was named delegate general in the territories occupied on 9 July 1940. Ten days later he resigned, and he joined de Gaulle in 1943. He is member (1944) next president of French Academy of Moral and Political Sciences (1958).
He was a Member of the French Parliament (RPF) (1951–1955).
He was the first President of the Constitutional Council of France (1959–1965).
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