Sakhalin Koreans are Russian citizens and residents of Korean descent living on Sakhalin Island, who can trace their roots to the immigrants from the Gyeongsang and Jeolla provinces of Korea during the late 1930s and early 1940s, the latter half of the Japanese ruling era.

Oroks, sometimes called Uilta, are a people in the Sakhalin Oblast in Russia. The Orok language belongs to the Southern group of the Tungusic language family. According to the 2002 Russian census, there were 346 Oroks living in Northern Sakhalin by the Okhotsk Sea and Southern Sakhalin in the district by the city of Poronaysk. According to the 2010 census there were 295 Oroks in Russia.