Kato Vlasia (Greek: Κάτω Βλασία) is a mountain village and a community in the municipality of Kalavryta, Achaea, Greece.

The community consists of the villages Kato Vlasia, Menychtaiika and Metochi.

It is situated at about 800 m elevation.

near the source of the river Selinountas, east of the highest summit of Mount Erymanthos.

It is 1 km north of Ano Vlasia, 16 km southeast of Chalandritsa and 17 km west of Kalavryta.