- Gebze ( 281,436 )
- İzmit ( 196,571 )
- Körfez ( 90,580 )
- Geulzuk ( 56,189 )
- Karamürsel ( 30,525 )
- Kandıra ( 13,805 )
- Köseköy ( 9,200 )
- İhsaniye ( 9,186 )
- Kullar ( 8,820 )
- Bahçecik ( 8,648 )
- Yuvacık ( 7,338 )
- Tavşancıl ( 3,593 )
- Karşıyaka ( 3,221 )
- Halıdere ( 3,073 )
- Ulaşlı ( 2,630 )
