| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Oughtagh | city | County Mayo | Ireland | 53.92 | -9.10 | 147 | 1864 |
| Owenboy | city | County Mayo | Ireland | 54.08 | -9.43 | 206 | 665 |
| Owenduff | city | County Mayo | Ireland | 54.03 | -9.68 | 370 | 146 |
| Owenduff | city | County Mayo | Ireland | 53.95 | -9.84 | 16 | 437 |