Kato Achaia is a town and community located in the regional unit of Achaea in West Greece. Following the 2011 local government reform, it became part of the municipality of West Achaea, serving as its administrative seat.
The community of Kato Achaia comprises the town itself along with several surrounding villages, including Alykes, Manetaiikia, Paralia Kato Achaias, and Piso Sykea. The area is also situated near the archaeological remains of the ancient city of Dyme.