Kocaeli is a province of Turkey.
Boundaries: Natural Earth (naturalearthdata.com), public domain
| Akçaova Bucağı | no seat recorded | |
| Akmeşe Bucağı | no seat recorded | |
| Aydınlı | no seat recorded | |
| Bahçecik Bucağı | no seat recorded | |
| Başiskele | no seat recorded | 77 k |
| Bekirpaşa Bucağı | no seat recorded | |
| Büyük Derbent Bucağı | no seat recorded | |
| Çayırova | Çayırova | 104 k |
| Darıca | no seat recorded | 164 k |
| Darıca Bucağı | no seat recorded | |
| Değirmendere Bucağı | no seat recorded | |
| Derince Bucağı | no seat recorded | |
| Derince İlçesi | Derince | 131 k |
| Dilovası | no seat recorded | 53 k |
| Gebze | Gebze | 407 k |
| Gölcük İlçesi | Gölcük | 146 k |
| Hereke Bucağı | no seat recorded | |
| İzmit | İzmit | 333 k |
| Kandıra Bucağı | no seat recorded | |
| Kandıra İlçesi | Kandıra | 50 k |
| Karamürsel Bucağı | no seat recorded | |
| Karamürsel İlçesi | Karamürsel | 53 k |
| Kartepe | Kartepe | 102 k |
| Kaymas Bucağı | no seat recorded | |
| Körfez Bucağı | no seat recorded | |
| Körfez İlçesi | Körfez | 143 k |
| Mollafeneri Bucağı | no seat recorded | |
| Saraybahçe Bucağı | no seat recorded | |
| Yalakdere Bucağı | no seat recorded |
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