Ιωνικός Νικαίας) is a Greek multi-sports club that is based in the suburban town of Nikaia within the Piraeus agglomeration.

It was founded in 1965, and it has teams in football, basketball, and water polo.

[1] The first departments of the club were the football and the basketball teams.

Ionikos had notable players, such as Panagiotis Giannakis, and it played two times in the FIBA Korać Cup.

The successor of Ionikos achieved a win of the Greek Volleyball Cup in 2003.