Agapetus II (died November 8, 955) was Pope from May 10, 946 until his death in 955, at the time when Alberic, son of Marozia, was governing the independent republic of Rome under the title of "prince and senator of the Romans."

Agapetus, a man of some force of character, did his best to put a stop to the degradation into which the Papacy had fallen, the so-called "Pornocracy," which lasted from the accession of Sergius III in 904 to the deposition of John XII in 963. His appeal to Otto the Great to intervene in Rome remained without immediate effect, since Alberic's position was too strong to be attacked, but it bore fruit after his death.