| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Iio | city | Norra Osterbotten | Finland | 65.32 | 25.37 | 42 | 2015 |
| Iio | city | Chiba | Japan | 35.45 | 140.24 | 95 | 67885 |
| Iioka | city | Chiba | Japan | 35.70 | 140.72 | 0 | 40606 |
| Iioka | city | Niigata | Japan | 38.17 | 139.47 | 137 | 24612 |
| Iioko | city | Morobe | Papua New Guinea | -6.26 | 147.17 | 7549 | 1490 |