UpAlphabetical listing of Places in Kocaeli
| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
| Hacilar | city | Kocaeli | Turkey | 41.04 | 30.06 | 144 | 7003 |
| Hacimazli | city | Kocaeli | Turkey | 41.10 | 30.05 | 265 | 6715 |
| Hacı | city | Kocaeli | Turkey | 40.85 | 29.75 | 935 | 12559 |
| Hacıibrahim Çiftliği | city | Kocaeli | Turkey | 40.76 | 30.05 | 45 | 73477 |
| Hacıyusuflar | city | Kocaeli | Turkey | 40.85 | 29.75 | 935 | 12559 |
| Hacışeyh | city | Kocaeli | Turkey | 41.00 | 30.01 | 830 | 7003 |
| Hadji | city | Kocaeli | Turkey | 40.85 | 29.75 | 935 | 12559 |
| Hakaniye | city | Kocaeli | Turkey | 40.90 | 29.98 | 830 | 7003 |
| Halıdere | city | Kocaeli | Turkey | 40.72 | 29.75 | 830 | 44087 |
| Hamidiye | city | Kocaeli | Turkey | 40.67 | 29.82 | 830 | 58611 |
| Hamidiye | city | Kocaeli | Turkey | 40.87 | 29.43 | 830 | 76010 |
| Hasancik | city | Kocaeli | Turkey | 40.81 | 30.20 | 830 | 7520 |
| Hasaney | city | Kocaeli | Turkey | 40.66 | 29.86 | 830 | 43907 |
| Hasaneyn | city | Kocaeli | Turkey | 40.66 | 29.86 | 830 | 43907 |
| Hasaniye | city | Kocaeli | Turkey | 40.66 | 29.86 | 830 | 43907 |
| Hasineyin | city | Kocaeli | Turkey | 40.66 | 29.86 | 830 | 43907 |
| Hatipler | city | Kocaeli | Turkey | 41.05 | 29.97 | 830 | 7003 |
| Hatipler | city | Kocaeli | Turkey | 40.97 | 29.72 | 830 | 7003 |
| Hatipler | city | Kocaeli | Turkey | 40.96 | 29.97 | 830 | 7003 |
| Havuzdere | city | Kocaeli | Turkey | 40.68 | 29.95 | 859 | 46906 |
| Hayriye | city | Kocaeli | Turkey | 40.63 | 29.57 | 830 | 25126 |
| Hediyeli | city | Kocaeli | Turkey | 41.05 | 30.03 | 311 | 7003 |
| Hereke | city | Kocaeli | Turkey | 40.79 | 29.61 | 0 | 36677 |
| Herekefabrikası | city | Kocaeli | Turkey | 40.79 | 29.61 | 0 | 36677 |
| Hikmetiye | city | Kocaeli | Turkey | 40.71 | 30.11 | 275 | 73072 |
| Himmetli | city | Kocaeli | Turkey | 40.89 | 29.84 | 830 | 7003 |
| Himmetlidivanı | city | Kocaeli | Turkey | 40.89 | 29.84 | 830 | 7003 |
| Hisareyn | city | Kocaeli | Turkey | 40.69 | 29.85 | 830 | 54846 |
| Hizirlar | city | Kocaeli | Turkey | 40.94 | 30.27 | 830 | 6852 |
| Hocaköy | city | Kocaeli | Turkey | 40.94 | 29.89 | 1013 | 7003 |
| Horzum | city | Kocaeli | Turkey | 40.91 | 29.98 | 830 | 7003 |
| Hüdaverdiler | city | Kocaeli | Turkey | 40.98 | 30.09 | 830 | 7003 |
| Hıdırlar | city | Kocaeli | Turkey | 40.94 | 30.27 | 830 | 6852 |
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