Petalidi (Greek: Πεταλίδι) is a village and a former municipality in Messenia, Peloponnese, Greece.

Its population is 1,203 inhabitants, while the municipal unit has 2,555 residents (2021).

Petalidi is a touristic place in Messinia, visited mostly in summer months.

Landmarks of the village are: The central square with the Church of Agios Nikolaos, the seafront, the lighthouse, the park on the port, the fount of Liar (η βρύση του ψεύτη in Greek) and the football field beside the sea.

The municipal unit Petalidi is subdivided into the following communities (2021 population in brackets):[1]