| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Odoca | city | Cill Mhantain | Ireland | 52.8527778 | -6.2169444 | 305 | 4588 |
| Oldboleys | city | Cill Mhantain | Ireland | 53.1994444 | -6.2777778 | 1115 | 35526 |
| Oldbridge | city | Cill Mhantain | Ireland | 53.05 | -6.2755556 | 892 | 4565 |
| Oldcourt | city | Cill Mhantain | Ireland | 53.1755556 | -6.4705556 | 951 | 13228 |
| Ovoca | city | Cill Mhantain | Ireland | 52.8527778 | -6.2169444 | 305 | 4588 |
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