| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Ornauka | city | Rezeknes Novads | Latvia | 56.35 | 26.98 | 830 | 934 |
| Osani | city | Rezeknes Novads | Latvia | 56.37 | 27.60 | 830 | 754 |
| Osinauka | city | Rezeknes Novads | Latvia | 56.63 | 27.13 | 830 | 912 |
| Osinovka | city | Rezeknes Novads | Latvia | 56.63 | 27.13 | 830 | 912 |
| Ozolaine | city | Rezeknes Novads | Latvia | 56.45 | 27.27 | 830 | 1893 |
| Ozolmuiža | city | Rezeknes Novads | Latvia | 56.48 | 27.23 | 830 | 1275 |