| population | |
| Basiskele | 76605 |
| Cayirova | 103536 |
| Darica | 164385 |
| Derince Ilcesi | 130657 |
| Dilovasi | 45610 |
| population | |
| Gebze | 329195 |
| Goelcuek Ilcesi | 145805 |
| Izmit | 332754 |
| Kandira Ilcesi | 50046 |
| Karamuersel Ilcesi | 53033 |
| population | |
| Kartepe | 101692 |
| Koerfez Ilcesi | 142884 |
| Merkez |
 | Cengiz Topel Airport | ~ 24.59 km |
| Istanbul Sabiha Gökçen International Airport | ~ 51.09 km |
| Bursa Yenişehir Airport | ~ 79.40 km |
| İstanbul Atatürk Airport | ~ 92.00 km |
| İstanbul Airport | ~ 105.64 km |
| Anadolu Airport | ~ 133.24 km |
| Eskişehir Air Base | ~ 137.98 km |
| Tekirdağ Çorlu Airport | ~ 169.36 km |
| Bandırma Airport | ~ 176.67 km |
