| Lieksanjoki, Lenderka | |
| Source1: | Lake Sula |
| Mouth: | Lake Pielinen |
| Mouth Coordinates: | 63.3316°N 30.4642°W |
| Subdivision Type1: | Countries |
Lieksanjoki or Lenderka (ru|Лендерка) is a river of Finland and Russia that begins in the Republic of Karelia in Russia. It flows into the Lake Pielinen in Northern Karelia, Finland.[1] Parts of its basin in Russia are the lakes Lake Leksozero and Lake Tulos in the Republic of Karelia. The river itself is a part the Vuoksi River basin in Finland and Russia, which in turn is a part of the Neva basin in Russia.