Marie-Esprit-Léon Walras (French: [valʁas]; 16 December 1834 – 5 January 1910) was a French mathematical economist and Georgist. He formulated the marginal theory of value (independently of William Stanley Jevons and Carl Menger ) and pioneered the development of general equilibrium theory.

Leon, Léon (French) or León (Spanish) may refer to: