Diego de Astorga y Céspedes (17 October 1663 – 9 February 1734) was a Spanish Cardinal of the Roman Catholic Church.

Diego de Astorga y Céspedes was born in Gibraltar, then a Spanish town.

However, he never received the red hat and the title and did not participate in the 1730 conclave, which elected Pope Clement XII.

He was also a member of the Privy council of the king Philip V after his abdication to his son Louis I.

[4] Cardinal Astorga y Céspedes died in 1734 in Madrid and is buried at the feet of El Transparente in the cathedral of Toledo.