| Tenniöjoki | |
| Name Other: | Russian: Тенниёйоки |
| Subdivision Type1: | Countries |
| Subdivision Type2: | Region |
| Subdivision Name2: | Lapland |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Salla |
| Subdivision Type4: | Oblast |
| Subdivision Name4: | Murmansk |
| Subdivision Type5: | District |
| Subdivision Name5: | Kandalakshskiy |
| Length: | 73km (45miles) |
| Discharge1 Location: | Kemijoki |
| Source1 Location: | Minkelimunturi, Russia |
| Source1 Coordinates: | 67.3467°N 29.7039°W |
| Mouth Location: | Finland |
| Mouth Coordinates: | 67.2794°N 28.2472°W |
| Progression: | Kemijoki→ Gulf of Bothnia |
| Basin Size: | 725km2 |
The Tenniöjoki is a river in Russia and Finland. It begins in Murmansk Oblast in Russia from where it flows into Finnish territory in Lapland region. It is a tributary of Kemijoki and one of its tributaries is Kuolajoki which also begins on the Russian side of the border and ends in Finland.
The river is long and the area of its watershed is . It starts in a swampy area by the slopes of the Minkeliminturi mountain.