Kareika (Greek: Καρέικα, also: Καράιικα - Karaiika) is a village and a community in the municipal unit of Movri, Achaea, Greece.

The community consists of the villages Kareika, Gomosto, Karamesineika and Rachi.

It is located north of the Movri hills, 3 km east of Sageika, 6 km southwest of Kato Achaia and 25 km southwest of Patras.

The Greek National Road 9/E55 (Patras - Pyrgos) passes through the community.

The population in 2021 by village:[1]