| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Oía | city | Nomos Kykladon | Greece | 36.46 | 25.38 | 449 | 2041 |
| Oín | city | Comunidad Autonoma de Galicia | Spain | 42.77 | -8.68 | 82 | 9781 |
| Oíon | city | Nomos )) (( Piraios | Greece | 38.13 | 23.85 | 1181 | 79311 |
| Oíssa | city | Mozambique | -25.15 | 32.12 | 160 | 596 | |
| Oítilon | city | Nomos )) (( Piraios | Greece | 36.70 | 22.38 | 0 | 1391 |