Ionikos Nikaias (full name Athlitikos Omilos Ionikos Nikaias, A.O. Ionikos Nikaias / Greek: Α.Ο. 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. The club's name derives from Ionia, the birthplace of many residents of Nikaia, which came to Nikaia as refugees after the Asia Minor Disaster. The club's colours are blue and white.