Diego Valderas Sosa (born 25 January 1953) is a Spanish politician of the United Left (IU). He was the first democratically elected mayor of his hometown of Bollullos Par del Condado in the Province of Huelva (1979–1994) and a member of the Parliament of Andalusia (1986–2000; 2008–2015). He was the general coordinator of the United Left/The Greens–Assembly for Andalusia (IULV–CA) from 2000 to 2013, the President of the Parliament of Andalusia (1994–1996) and the Vice President of the Regional Government of Andalusia (2012–2015).[1][2]