| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Oddastadhir | city | Iceland | 64.92 | -22.23 | 190 | 0 | |
| Oddastaðir | city | Iceland | 64.92 | -22.23 | 190 | 0 | |
| Olviskross | city | Iceland | 64.92 | -22.23 | 190 | 0 | |
| Orlygsstadhir | city | Iceland | 64.97 | -22.58 | 65 | 0 | |
| Os | city | Iceland | 65.03 | -22.57 | 88 | 0 | |
| Os | city | Iceland | 64.92 | -23.55 | 32 | 0 | |
| Oxl | city | Iceland | 64.83 | -23.43 | 85 | 0 |