José Antonio Griñán Martínez (born 7 June 1946) is a Spanish politician.
He is the chairman of the centre-left Spanish Socialist Workers' Party (PSOE), and from 23 April 2009 until 7 September 2013 he held the position of President of the Regional Government of Andalusia.
He was sentenced to 6 years of prison due to prevarication and embezzlement of public funds in the granting of aid to companies in crisis for 10 years worth 680 million euros.
He replaced Manuel Chaves when Chaves was named Third Vice President of the Government of Spain in charge of Territorial Policy.
In 2013 he announced his intention of stepping down and was subsequently replaced by the then regional Minister of the Presidency Susana Díaz.