| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Olafsfjördhur | city | Iceland | 66.07 | -18.65 | 889 | 614 | |
| Olvesgerdhi | city | Iceland | 65.50 | -18.20 | 206 | 0 | |
| Ongulsstadhir | city | Iceland | 65.60 | -18.05 | 236 | 572 | |
| Os | city | Iceland | 65.80 | -18.22 | 19 | 200 | |
| Oxnafellskot | city | Iceland | 65.48 | -18.13 | 977 | 0 |