The Tyukyan (Russian: Тюкян; Yakut: Түүкээн Tüükeen) is a river in the Republic of Sakha in Russia.

After flowing across desolate areas it only reaches the inhabited Verkhnevilyuysky District about 50 km (31 mi) upstream from its mouth.

[2] In 1634, Russian Cossacks, headed by Voin Shakhov, established a winter settlement at the confluence of the rivers Vilyuy and Tyukyan.

The Tyukyan has its source close to the west of lake Eyik, in the eastern part of the Central Siberian Plateau in a swampy area near the Tyung basin, just south of the Arctic Circle, at an elevation of about 320 metres (1,050 ft).

When it reaches the Central Yakutian Lowland it begins to meander strongly among swamps and small lakes, flowing roughly southwards, until it meets the left bank of the Vilyuy near Verkhnevilyuysk.