UpAlphabetical listing of Places in Niigata
| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
| Ō-warino | city | Niigata | Japan | 37.01 | 138.65 | 853 | 9362 |
| Ōarato | city | Niigata | Japan | 37.48 | 138.80 | 91 | 69924 |
| Ōaratomachi | city | Niigata | Japan | 37.48 | 138.80 | 91 | 69924 |
| Ōdai | city | Niigata | Japan | 38.50 | 139.64 | 921 | 3360 |
| Ōdōri | city | Niigata | Japan | 37.84 | 139.02 | 3 | 128797 |
| Ōishi | city | Niigata | Japan | 38.04 | 139.56 | 390 | 4945 |
| Ōkubo | city | Niigata | Japan | 36.99 | 137.91 | 931 | 8454 |
| Ōkura | city | Niigata | Japan | 37.70 | 139.22 | 164 | 24259 |
| Ōkurida | city | Niigata | Japan | 38.18 | 139.60 | 830 | 3093 |
| Ōmae | city | Niigata | Japan | 36.94 | 137.86 | 830 | 4569 |
| Ōmaki | city | Niigata | Japan | 37.70 | 139.39 | 328 | 2764 |
| Ōnomachi | city | Niigata | Japan | 37.85 | 139.02 | 3 | 145923 |
| Ōnuma-shinden | city | Niigata | Japan | 37.61 | 138.88 | 19 | 45704 |
| Ōsawa | city | Niigata | Japan | 37.25 | 138.65 | 830 | 8186 |
| Ōsawa | city | Niigata | Japan | 37.23 | 139.00 | 830 | 16121 |
| Ōshika | city | Niigata | Japan | 36.94 | 138.26 | 961 | 8822 |
| Ōsugi | city | Niigata | Japan | 37.84 | 138.37 | 0 | 3764 |
| Ōtaira | city | Niigata | Japan | 37.40 | 139.07 | 1715 | 4423 |
| Ōtsuki | city | Niigata | Japan | 38.26 | 139.45 | 328 | 15303 |
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