Julio Antonio Gastón Durán Neumann (20 March 1918 – 27 November 1990), was a Chilean lawyer and politician.

He ran for President in 1964 against Eduardo Frei Montalva and Salvador Allende.

He was a member of the Radical Democracy Party, which advocated ideas taken from Classical liberalism and Radicalism.

Duran was a State Deputy (1945–1957) and State Senator (1957–1973).