Agios Nikolaos is a village in West Achaea Municipality, in the regional unit of Achaea, in the region of West Greece, Greece. Agios Nikolaos lies at 211 m above sea level, in the Peloponnese mountains, on the Peloponnese peninsula. It has 146 inhabitants (2021). The nearest city is Patras, 33 km to the northeast. Among the landmarks around are Elis (17.4 km), Olympia (42 km) and Dyme (16.0 km).

Also written Άγιος Νικόλαος.