Giovanni Antonio Santorio (died May 1628) was a Roman Catholic prelate who served as Bishop of Policastro (1610–1628).^[1]

On 26 April 1610, Giovanni Antonio Santorio was appointed by Pope Paul V as Bishop of Policastro.^[1] He served as Bishop of Policastro until his death in May 1628.^[1] While bishop, he was the principal co-consecrator of Benedikt Orsini, Bishop of Lezhë, and Pietro Budi, Bishop of Sapë.^[1]

• Cheney, David M. "Diocese of Policastro". Catholic-Hierarchy.org. Retrieved January 3, 2019. (for Chronology of Bishops) ^{[self-published]}
• Chow, Gabriel. "Diocese of Policastro (Italy)". GCatholic.org. Retrieved January 3, 2019. (for Chronology of Bishops) ^{[self-published]}