| Tuntsayoki | |
| Name Other: | Finnish: Tuntsajoki |
| Subdivision Type1: | Countries |
| Subdivision Type2: | Oblast |
| Subdivision Name2: | Murmansk |
| Subdivision Type3: | Region |
| Subdivision Name3: | Lapland |
| Length: | 150km (90miles) |
| Mouth Location: | Tumcha |
| Mouth Coordinates: | 66.7368°N 30.4896°W |
| Tributaries Left: | Vatsimanyoki |
The Tuntsayoki (Russian: Тунтсайоки, Finnish: Tuntsajoki) is a river in the south of the Kola Peninsula in Murmansk Oblast, Russia. It is 150km (90miles) long. The Tuntsayoki originates in the forests of Finland and flows into the river Tumcha. Its biggest tributary is the Vatsimanyoki.