Aigeira is a town and a former municipality in northeastern Achaea, West Greece, Greece. Since the 2011 local government reform it has been a municipal unit of the Aigialeia municipality, with an area of 103.646 km2. The municipal unit stretches from the Gulf of Corinth, where the town of Aigeira is located, to the mountains in the south. The town of Aigeira is 26 km (16 mi) southeast of Aigio, 55 km (34 mi) northwest of Corinth and 55 km (34 mi) east of Patras.