| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Babakoy | city | Kocaeli Ili | Turkey | 41 | 30.1166667 | 442 | 31697 |
| Babaköy | city | Kocaeli Ili | Turkey | 41 | 30.1166667 | 442 | 31697 |
| Bagchejik | city | Kocaeli Ili | Turkey | 40.6691667 | 29.9125 | 1919 | 27621 |
| Bagcilar | city | Kocaeli Ili | Turkey | 41.0833333 | 29.9 | 475 | 67571 |
| Bagirganli | city | Kocaeli Ili | Turkey | 41.1241667 | 30.0113889 | 22 | 26681 |
| Bahcecik | city | Kocaeli Ili | Turkey | 40.6691667 | 29.9125 | 1919 | 27621 |
| Bahçecik | city | Kocaeli Ili | Turkey | 40.6691667 | 29.9125 | 1919 | 27621 |
| Balca | city | Kocaeli Ili | Turkey | 41 | 30.1166667 | 442 | 31697 |
| Balci | city | Kocaeli Ili | Turkey | 41.0666667 | 30.1833333 | 298 | 31661 |
| Balcik | city | Kocaeli Ili | Turkey | 40.8725 | 29.4283333 | 666 | 31759 |
| Balcı | city | Kocaeli Ili | Turkey | 41.0666667 | 30.1833333 | 298 | 31661 |
| Balikoyu | city | Kocaeli Ili | Turkey | 40.8 | 29.75 | 1171 | 29085 |
| Balli | city | Kocaeli Ili | Turkey | 40.8 | 29.75 | 1171 | 29085 |
| Baloren | city | Kocaeli Ili | Turkey | 40.8333333 | 30.1333333 | 1010 | 31778 |
| Balçık | city | Kocaeli Ili | Turkey | 40.8725 | 29.4283333 | 666 | 31759 |
| Balören | city | Kocaeli Ili | Turkey | 40.8333333 | 30.1333333 | 1010 | 31778 |
| Balıköyü | city | Kocaeli Ili | Turkey | 40.8 | 29.75 | 1171 | 29085 |
| Bayrakdar | city | Kocaeli Ili | Turkey | 40.7833333 | 30.1 | 255 | 31801 |
| Bayraktar | city | Kocaeli Ili | Turkey | 40.7833333 | 30.1 | 255 | 31801 |
| Bağcılar | city | Kocaeli Ili | Turkey | 41.0833333 | 29.9 | 475 | 67571 |
| Bağırganlı | city | Kocaeli Ili | Turkey | 41.1241667 | 30.0113889 | 22 | 26681 |
| Belen | city | Kocaeli Ili | Turkey | 40.8138889 | 29.755 | 1240 | 29085 |
| Belen | city | Kocaeli Ili | Turkey | 41.0833333 | 30.0166667 | 364 | 31661 |
| Besevler | city | Kocaeli Ili | Turkey | 40.8333333 | 30.2333333 | 547 | 27526 |
| Beylerbeyi | city | Kocaeli Ili | Turkey | 41.1 | 30 | 423 | 26681 |
| Beylik | city | Kocaeli Ili | Turkey | 40.6333333 | 29.8 | 1515 | 30093 |
| Beşevler | city | Kocaeli Ili | Turkey | 40.8333333 | 30.2333333 | 547 | 27526 |
| Biberci | city | Kocaeli Ili | Turkey | 40.8 | 30.1 | 416 | 31778 |
| Bollu | city | Kocaeli Ili | Turkey | 41.1166667 | 30.05 | 242 | 26833 |
| Bollukoy | city | Kocaeli Ili | Turkey | 41.1166667 | 30.05 | 242 | 26833 |
| Bolluköy | city | Kocaeli Ili | Turkey | 41.1166667 | 30.05 | 242 | 26833 |
| Borcka | city | Kocaeli Ili | Turkey | 40.6833333 | 29.8166667 | 751 | 28478 |
| Borçka | city | Kocaeli Ili | Turkey | 40.6833333 | 29.8166667 | 751 | 28478 |
| Bozburun | city | Kocaeli Ili | Turkey | 41.0241667 | 30.2288889 | 531 | 31679 |
| Buberci | city | Kocaeli Ili | Turkey | 40.8 | 30.1 | 416 | 31778 |
| Bullu | city | Kocaeli Ili | Turkey | 41.1166667 | 30.05 | 242 | 26833 |
| Burhan | city | Kocaeli Ili | Turkey | 41.1 | 30.1166667 | 206 | 27153 |
| Buyukderbent | city | Kocaeli Ili | Turkey | 40.6983333 | 30.1405556 | 278 | 31063 |
| Büberci | city | Kocaeli Ili | Turkey | 40.8 | 30.1 | 416 | 31778 |
| Büyükderbent | city | Kocaeli Ili | Turkey | 40.6983333 | 30.1405556 | 278 | 31063 |
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