Olenia

File:Fragma Asteriou i Fragma Parapeirou, Achaia (Asteri or Parapiros Dam Lake, Achaia, Greece).jpg

Asteri Dam or Parapiros Dam in Farres and Olenia boundary region. View of the dam lake. The temporary islet with Saint Theodores' chapel of Mitopolis village sinking. Mt. Erymanthos in the background.

Olenia (Template:Langx) is a former municipality in Achaea, West Greece, Greece. Since the 2011 local government reform it is part of the municipality West Achaea, of which it is a municipal unit. The municipal unit has an area of 189.534 km². Population 4,303 (2021). The seat of the municipality was in Lousika. The municipality is named after the ancient Achaean town Olenus.

Subdivisions

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

• Achaiko
• Agios Nikolaos Kralis (Kalamaki, Agios Nikolaos, Avgeraiika, Thomaiika, Poimenochori)
• Agios Stefanos (Agios Stefanos, Palaia Peristera, Fylakes)
• Ano Soudenaiika
• Arla
• Chaikali (Chaikali, Katsaitaiika, Kounelaiika)
• Charavgi (Charavgi, Neochori, Pigadia)
• Flokas (Flokas, Zisimaiika)
• Fostaina
• Galanaiika
• Gkaneika
• Kato Mazaraki
• Lousika (Lousika, Spaliaraiika, Ypsili Rachi)
• Mitopoli (Mitopoli, Komi, Souvaliotaiika)
• Portes
• Santomeri (Santomeri, Ampelakia, Polylofo)