The Sikhote-Alin (Russian: Сихотэ́-Али́нь) is a mountain range in Primorsky and Khabarovsk Krais, Russia, extending about 900 km to the northeast of the Russian Pacific seaport of Vladivostok. The highest summits are Tordoki Yani (2,077 m), Ko Mountain (2,003 m) in Khabarovsk Krai and Anik Mountain (1,933 m) in Primorsky Krai.

Sikhote-Alin comprises one of the most extraordinary temperate zones in the world. Species typical of northern taiga (such as reindeer and the Ussuri Brown Bear) coexist with tropical species, the Amur leopard, Siberian tiger, and the Asiatic Black Bear. The region holds very few wolves, due to competition with tigers. The oldest tree in the region is a millennium-old Japanese yew.

In the 1910s and 1920s, Sikhote-Alin was extensively explored by Vladimir Arsenyev (1872–1930) who described his adventures in several books, notably Dersu Uzala (1923), which in 1975 was turned into an Oscar-winning film by Akira Kurosawa. The large Sikhote-Alin and Lazo wildlife refuges were set up in 1935 to preserve the region's unusual wildlife.