Ιωνικός Νικαίας) is a Greek football club based in Nikaia, Greece, currently competing in the Piraeus FCA Championship, an amateur category.

[6] The club's early years were indifferent in progress but Ionikos became a mainstay of the Greek Second Division through the 1970s before being relegated in 1976.

[6] Kanellakis' arrival would be the beginning of the club's greatest era—from the 1989 promotion, Ionikos would spend 16 of the next 18 seasons in the Greek top flight, up until 2007, and during that time the team would finish as high as 5th-place in the league (on two occasions), reach a Greek Cup Final, and compete in the UEFA Europa League.

[6] Ionikos reached the Greek Cup Final later that same season under the management of Oleg Blokhin, where they came up against traditional power AEK Athens, losing 3–0.

Ionikos spent the following two seasons in the Football League, finishing 5th and 4th place, respectively, as the club failed to get promoted to the top flight.

[7] After an impressive first season back at the top flight, in which the club finished 7th, Ionikos finished in the regular season 12th with 18 points the following year, one point above the relegation zone, the club were relegated in the Play-out round after a dramatic encounter with fellow relegation contenders Lamia, in which Ionikos led 2–0 at half time before Lamia equalised to remain in the top flight, while Ionikos returned to the Super League Greece 2 following the result.

[8] Ionikos plays its home matches at Neapolis Public Stadium (Greek: Γήπεδο Νεάπολης), located in Nikaia, a suburb of Piraeus.

The football matches between Ionikos and Proodeftiki are called «The Derby of Kokkinia» Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.