Paia (Greek: Πάϊα) is a former municipality in Achaea, West Greece, Greece. The seat of the municipality was in Dafni. The municipality was created after the Greek War of Independence and was dissolved in 1912. It was recreated in 1998 under the Capodistrian Plan. Since the 2011 local government reform it is part of the municipality Kalavryta, of which it is a municipal unit. The municipal unit has an area of 99.325 km.

Subdivisions

The municipal unit Paia is subdivided into the following communities (constituent villages in brackets):

• Amygdalea
• Chovoli (Ano Chovoli, Kato Chovoli)
• Dafni
• Nasia
• Paos (Paos, Vesini, Dechounaiika, Palaios Paos, Potamia)
• Pefko
• Skotani (Skotani, Agios Georgios)

Population

Year	Population
1991	2,623
2001	2,579
2011	1,055
2021	997

Mayors

• Papadimitrakopoulos (1907–1912)