The 2023–24 season is Kocaelispor's 58th season in existence and first one back in the TFF First League, the second division of Turkish football. They will also compete in the Turkish Cup.

As of 15 September 2023^[1]

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply. Players may hold more than one non-FIFA nationality.

No. Pos. Nation Player 1 GK  TUR Harun Tekin 2 DF  TUR Alihan Kubalas 3 DF  TUR Onur Atasayar 4 DF  TUR Emir Ortakaya (on loan from Fenerbahçe) 7 FW  GER Cem Ekinci 8 MF  NED Cihat Çelik 9 FW  TUR Atabey Çiçek 10 FW  POR Daniel Candeias (vice-captain) 11 FW  SWE Christian Kouakou 14 FW  GEO Giorgi Beridze 19 DF  TUR Atila Turan 20 MF  TUR Mert Çölgeçen 21 FW  TUR Bedirhan Yıldız 24 MF  GUI Ibrahima Fofana (on loan from Hammarby)

No. Pos. Nation Player 27 DF  TUR Emre Nefiz 32 DF  TUR Mehmet Yılmaz 33 FW  TUR Ömer Tuğ 35 GK  TUR Gökhan Değirmenci (captain) 40 MF  TUR Yusuf Emre Gültekin 41 MF  POR João Amaral 45 MF  TUR Mesut Can Tunalı 53 DF  TUR Burak Öksüz 55 DF  TUR Yusuf Abdioğlu 67 GK  TUR Mehmet Enes Sarı 70 FW  TUR Barış Alıcı (on loan from Samsunspor) 77 DF  TUR Oğuz Ceylan 99 FW  BRA Douglas Tanque

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply. Players may hold more than one non-FIFA nationality.

No. Pos. Nation Player — MF  TUR Olcan Gökdemir

No. Pos. Nation Player — MF  TUR Yağız Yolcu

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply. Players may hold more than one non-FIFA nationality.

No. Pos. Nation Player — GK  TUR Eren Bilen (at Darıca Gençlerbirliği until 30 June 2024) — DF  TUR Onur Öztonga (at Karacabey Belediyespor until 30 June 2024) — MF  TUR Berat Kartal (at Belediye Kütahyaspor until 30 June 2024) — MF  AZE Serhat Tasdemir (at Zonguldak Kömürspor until 30 June 2024)

No. Pos. Nation Player — FW  TUR Yağız Gül (at Darıca Gençlerbirliği until 30 June 2024) — FW  TUR Fatih Bektaş (at Zonguldak Kömürspor until 30 June 2024) — FW  TUR Hakan Özturk (at Gümüşhanespor until 30 June 2024)

Pos.	Player	Transferred from	Fee	Date	Source
FW	Douglas Tanque	Samsunspor	Unisclosed	17 August 2023
MF	Giorgi Beridze	Ankaragücü	Free	12 September 2023

  Win   Draw   Loss   Fixtures

Fatih Karagümrük v Kocaelispor

14 October 2023 Friendly	Fatih Karagümrük	2–1	Kocaelispor	Riva
		Report

The league fixtures were unveiled on 19 July 2023.^[2]

• Official website