| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| 川井 | city | Akita | Japan | 40.17 | 140.32 | 104 | 6191 |
| 川井 | city | Tokushima | Japan | 33.93 | 134.21 | 1669 | 1959 |
| 川井 | city | Fukushima | Japan | 37.48 | 139.66 | 984 | 2287 |
| 川井 | city | Yamagata | Japan | 37.92 | 140.14 | 948 | 28189 |
| 川井 | city | Gunma | Japan | 36.29 | 139.15 | 180 | 164563 |
| 川井宿町 | city | Kanagawa | Japan | 35.50 | 139.52 | 190 | 740691 |
| 川井本町 | city | Kanagawa | Japan | 35.49 | 139.51 | 190 | 735269 |