| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Oilgate | city | Loch Garman | Ireland | 52.4266667 | -6.5388889 | 157 | 4035 |
| Old Ross | city | Loch Garman | Ireland | 52.3925 | -6.82 | 259 | 4044 |
| Old Town | city | Loch Garman | Ireland | 52.5327778 | -6.7594444 | 498 | 4050 |
| Oldcourt | city | Loch Garman | Ireland | 52.3458333 | -6.9752778 | 141 | 3705 |
| Oldtown Cross Roads | city | Loch Garman | Ireland | 52.6411111 | -6.5330556 | 314 | 4089 |
| Orristown Cross Roads | city | Loch Garman | Ireland | 52.2588889 | -6.4533333 | 19 | 3420 |
| Oulart | city | Loch Garman | Ireland | 52.5036111 | -6.3822222 | 236 | 4033 |
|
|