| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Old Bride Bridge | city | Corcaigh | Ireland | 52.0561111 | -8.4158333 | 433 | 5192 |
| Old Chapel Cross Roads | city | Corcaigh | Ireland | 51.8063889 | -8.6944444 | 314 | 5223 |
| Old Courth | city | Corcaigh | Ireland | 51.8616667 | -8.3883333 | 282 | 5141 |
| Old Port House | city | Corcaigh | Ireland | 51.7927778 | -8.7883333 | 331 | 5223 |
| Oldcastletown | city | Corcaigh | Ireland | 52.2591667 | -8.4286111 | 291 | 5270 |
| Oldchapel | city | Corcaigh | Ireland | 51.7366667 | -8.7855556 | 249 | 5233 |
| Oldcourt | city | Corcaigh | Ireland | 51.6705556 | -8.5708333 | 232 | 4229 |
| Ovens | city | Corcaigh | Ireland | 51.8666667 | -8.6666667 | 282 | 5219 |
| Oysterhaven | city | Corcaigh | Ireland | 51.6916667 | -8.4430556 | 0 | 2246 |
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