| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Ordaspuszta | city | Nograd | Hungary | 47.89 | 19.45 | 830 | 2904 |
| Orhalom | city | Nograd | Hungary | 48.08 | 19.41 | 830 | 3991 |
| Ortvány-szénbánya | city | Nograd | Hungary | 48.03 | 19.93 | 830 | 5739 |
| Osagard | city | Nograd | Hungary | 47.86 | 19.19 | 944 | 5281 |