Olenia

Olenia () is a municipal unit of the municipality of West Achaea in the Peloponnese peninsula of Greece. Until the 2011 local government reform, it was a separate municipality with the village of Lousika as its seat. It covers an area of 189.534 km2 and has a population of 4,303 according to the 2021 census. Olenia is named after the ancient Achaean town of Olenus.

thumb | right Santomeri (Greek: Σαντομέρι) is a village and a community in the municipal unit of Olenia, Achaea, Greece. It is located on the northern end of Mount Skollis, 5 km north of Portes, 18 km south of Kato Achaia and 32 km southwest of Patras. The community includes the villages Ampelakia and Polylofo.

thumb|left|150px|Serdini River near Lousika Lousika (Greek: Λουσικά) is a village and a community in Achaea, Greece. It is located 5 km southeast of Kato Achaia, 3 km south of Alissos, and 20 km southwest of Patras. The community includes the villages Ypsili Rachi and Spaliaraiika. Lousika was the seat of the former municipality of Olenia. The river Serdini flows through the village.

village in Achaea, Greece

Achaiko (, before 1928: Μπεδρόνι - Bedroni) is a village in the municipal unit of Olenia, Achaea, Greece. It is located on the left bank of the river Peiros, 2 km north of Lousika, 5 km east of Kato Achaia, and 18 km southwest of Patras.

Fostaina () is a village in the municipal unit of Olenia, Achaea, Greece. It is located in low hills, 3 km south of Lousika and 8 km southeast of Kato Achaia.

village in West Achaea municipality, Greece