| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Odoca | city | Wicklow | Ireland | 52.85 | -6.22 | 305 | 2493 |
| Oghil | city | Wicklow | Ireland | 52.88 | -6.16 | 830 | 1872 |
| Oldboleys | city | Wicklow | Ireland | 53.20 | -6.28 | 1115 | 5436 |
| Oldbridge | city | Wicklow | Ireland | 53.05 | -6.28 | 892 | 1055 |
| Oldcourt | city | Wicklow | Ireland | 53.18 | -6.47 | 951 | 2409 |
| Ovoca | city | Wicklow | Ireland | 52.85 | -6.22 | 305 | 2493 |