Kocaelispor
| Full name | Kocaelispor Kulübü | |||
|---|---|---|---|---|
| Nickname | Körfez (The Gulf) | |||
| Founded | 1966 | |||
| Ground | Kocaeli Stadium | |||
| Capacity | 34,829 | |||
| Chairman | Recep Durul | |||
| Head coach | Selçuk İnan | |||
| League | Süper Lig | |||
| 2024–25 | TFF 1. Lig, 1st of 20 (promoted) | |||
| Website | kocaelispor.com.tr | |||
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Kocaelispor (Turkish pronunciation: [kod͡ʒaˈelispoɾ], lit. 'Kocaeli Sports Club') is a professional football club based in İzmit, Kocaeli Province, Turkey. Founded in 1966, the club competes in the Süper Lig, the highest tier of the Turkish football league system, and plays home matches at the 34,829-seat Kocaeli Stadium. The traditional colours of the team are green and black.
Kocaelispor has had several top-flight spells, most notably from 1980 to 1988, 1992 to 2003, and in the 2008–09 season. Their best league finish was fourth in the 1992–93 season. The club has won the Turkish Cup twice, in 1997 and 2002, and has participated in European competition.
Nicknamed Körfez (The Gulf), the club has a strong following in İzmit and the surrounding Kocaeli region. Its fiercest rivalries are with Sakaryaspor and Gebzespor.
After financial collapse and successive relegations in the 2010s, Kocaelispor dropped into the amateur leagues. A rebuilding process led to successive promotions, culminating in a return to the Süper Lig in the 2024–25 season after a 16-year absence.