José Antonio Alonso Suárez (28 March 1960 – 2 February 2017) was a Spanish judge and politician, member of the Spanish Socialist Workers' Party (PSOE).

Born in León, he was a jurist (judge since 1985 after graduating from the University of Leon, magistrate 1989 and criminal court judge with the provincial court in Madrid) and academic at the law faculty of the University of Leon before his political career, Alonso was elected to the Spanish Congress as a member of the Spanish Socialist Workers' Party in 2004, representing León Province and was re-elected in 2008.

[1] Described by his ministerial colleagues as a man "driven by his strong ideological beliefs and professionalism",[1] Zapatero is said to have chosen Alonso on the grounds that the latter would fight terrorism without compromising human rights.

Prior to his election he had been a critic of the People's Party's support for George W. Bush and their alleged politicisation of judicial bodies.

[2] Alonso died from lung cancer in Madrid on 2 February 2017 at the age of 56.