Atlasov Island, known in Russian as Ostrov Atlasova or in Japanese as Araido, is the northernmost island and volcano and also the highest volcano of the Kuril islands, part of the Sakhalin Oblast in Russia. The Russian name is sometimes rendered in English as Atlasova Island. Other names for the island include Uyakhuzhach, Oyakoba and Alaid, the name of the volcano on the island.
The island is named after Vladimir Atlasov, a 17th-century Russian explorer who incorporated the nearby Kamchatka Peninsula into Russia. It is essentially the cone of a submarine volcano called Vulkan Alaid protruding above the Sea of Okhotsk to a height of 2,339 metres (7,674 feet). The island has an area of 119 square kilometres (46 square miles), but is currently uninhabited. Numerous pyroclastic cones dot the lower flanks of basaltic to basaltic andesite volcano, particularly on the NW and SE sides, including an offshore cone formed during the 1933–34 eruption.