Pineios () is a municipality in the Elis regional unit, West Greece region, Greece. The seat of the municipality is the town Gastouni. The municipality has an area of 161.496 km<sup>2</sup>. It was named after the river Pineios.
The municipality Pineios was formed at the 2011 local government reform by the merger of the following 3 former municipalities, that became municipal units: