Methydrio (Greek: Μεθύδριο, before 1927: Νεμνίτσα - Nemnitsa[2]) is a village in the municipal unit of Vytina, Arcadia, Greece.

It sits at 1,060 m above sea level, at the foot of the Mainalo mountains.

It was named after the ancient city Methydrium, the remains of which have been discovered near the village.

In the 2nd century AD, it was not a city anymore, but a village belonging to Megalopolis.

This article about a location in ancient Arcadia is a stub.