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 73 kilometres (45 mi) long and the area of its watershed is 725 square kilometres (280 sq mi). It starts in a swampy area by the slopes of the Minkeliminturi mountain.

• List of rivers in Finland

• Suuri tietosanakirja. WSOY, 2001. ISBN 951-0-26053-3. (in Finnish)
• Tietojätti. Gummerus, 1985. ISBN 951-864-059-9. (in Finnish)
• Keski- ja Ylä-Kemijoen kalatalousselvityksiä vuosina 1989–2000, s. 34–35. Lapin ympäristökeskus, 2006. ISSN 1455-2639. (in Finnish)

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