John XVIII, né Giovanni Fasano (died June 1009), pope from 1003 to 1009, was, during his whole pontificate, the mere creature of the patrician John Crescentius , and ultimately he abdicated and retired to a monastery, where he died shortly afterwards. His successor was Sergius IV.

Preceded by John XVII

Pope (list)

Succeeded by Sergius IV

This article incorporates text from the public domain 1911 Encyclopædia Britannica.