The Metropolis of Patras (Greek: Ιερά Μητρόπολις Πατρών) is a metropolitan see of the Church of Greece in the city of Patras in Achaea, Greece. The see traces its origins to its patron saint, Saint Andrew, in the 1st century. Historically, it has been one of the two pre-eminent sees of the Peloponnese along with the See of Corinth. The see has been part of the Greek Orthodox Church (the Patriarchate of Constantinople until 1833, the Church of Greece since then), except for the period where the city was part of the Principality of Achaea and a Latin see was installed.
The see of Patras was founded, according to tradition, by Saint Andrew, who was crucified there. His relics are still kept in the metropolitan cathedral of Saint Andrew of Patras.
Until 733, Patras was subordinated to the See of Corinth, and under the jurisdiction of the Patriarchate of Rome. In that year, Emperor Leo III the Isaurian transferred all the sees of the Illyricum to the Patriarchate of Constantinople.
Patras was later raised to an archbishopric, which it remained until 806, when it became a metropolitan see. It had four suffragans; then five about 940; after 1453 it had only two, which successively disappeared.