İzmit İzmit railway station İzmit Clock Tower Gulf of İzmit İzmit massacres 1999 İzmit earthquake İzmit İsmetpaşa Stadium İzmit Körfez Circuit İzmit Belediyespor Gökçeören, İzmit Kocaeli Stadium Osman Gazi Bridge Turkists of Izmit Kocaeli Province Tüpraş Izmit Oil Refinery Balaban, Kartepe List of populated places in Kocaeli Province Serhat Tutumluer Akçaray Şehit Polis Recep Topaloğlu Sports Hall Serra Çağan Beyza Kocatürk Hasan Gemici Gültepe Tunnel Kocaeli Museum Karamürsel Kocaeli Büyükşehir Belediyesi Kağıt S.K. Men's Ice Hockey Nasaş G.S.K. Ankara Express Fatma Kaplan Hürriyet Pertev Pasha Mosque Kocaeli University 2004–05 TBHSL season Korutep…

pe Tunnel Serkan Keskin Kırkikievler railway station Hersek Headland Turan Akalın Yarımca railway station Köseköy railway station Gökçeören Kocaelispor Turgay Ateş Mert Erdoğdu Ulaş Tuna Astepe Chemins de fer Ottomans d'Anatolie Ceyda Kozluca Cezmi Kartay SS Üsküdar Emel Türkyılmaz Hergeleci İbrahim Sea of Marmara Nevnihal Erdoğan Vogošća Greek Summer Offensive Nihat Ergün Metin Erol Cengiz Topel Özge Kavurmacıoğlu Körfez Kocaeli Bayan FK Blue Train (Turkey) Kartepe List of ports in Turkey Hereke 2013 IIHF World U18 Championship Division III Libyssa Abdurrahim Kuzu 2014 IIHF World U18 Championship Division III

Buse Güngör SEKA Paper Museum Otoyol 4 Kandıra 2003–04 TBHSL season Filinta Ragıp Savaş Tuba Yakan 1945 Turkish Football Championship Hereke Tunnel 2017 European Karate Championships Gebze railway station Geragathe 2013 IIHF World Championship Division II Karapınar, Karamürsel Erenköy railway station Gebze Burak Uygur Diliskelesi 1999 Turkey earthquake Kocaeli Büyükşehir Belediyesi Kağıt Spor Kulübü Gökçeviran Turkish Formula Three Championship Siege of Nicomedia 2012–13 Turkish Basketball Cup 2023–24 Galatasaray S.K. (women's basketball) season Kocaeli Peninsula Leptoia 2013–14 Turkish Women's First Football League Maltepe railw