Petroto (Greek: Πετρωτό) is a village and a community in the municipal unit of Messatida, Patras, Achaea, Greece.

The territory of the community Petroto stretches from the coastal plains to the low mountains in the south and east.

Mavromandila is at about 130 m elevation, Petroto at 730 m and Agia Paraskevi at about 900 m. The river Glafkos flows east and north of the community.

Adjacent communities are Saravali to the west, Neo Souli to the north, Moira to the east and Krystallovrysi to the south.

In 1821, during the Greek War of Independence, an important battle took place at Petroto (then known as Palaiopyrgos) and nearby Saravali.