| Olga | |
| Mouth: | Sea of Japan |
| Mouth Location: | Olga Bay |
| Mouth Coordinates: | 43.7313°N 135.2903°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Length: | 16km (10miles) |
The Olga (Russian: Ольга) is a river in Olginsky District, Primorsky Krai, Russia. It flows into the Olga Bay of the Sea of Japan. It is long.