Pope Anacletus (also called Cletus) was pope from 76 to 88, the second successor of St. Peter. He was put to death under the Emperor Domitian around 91 AD. He was buried near Saint Linus on the Vatican, where his relics remain.

There is some disagreement among Papal scholars as to whether Anacletus and Cletus are the same person.

Traditionally, Anacletus succeeded Pope Linus and was followed by Pope Clement I.