Little Sosva Nature Reserve is a Russian 'zapovednik' covering the basin of the Malaya Sosva River, on the east side of the Northern Ural Mountains in the territory of the West Siberian Plain. the Malaya Sosva is a right tributary of the North Sosva River, which flows into the Ob River on its way north to the Kara Sea. Are area of forested wetlands, the reserve protects flat lowlands with a broken relief, a significant incision of river valleys, and a developed river system. The reserve also protect cultural and architectural sites, including some related to the indigenous Khanty people. The southern two-thirds of the reserve is in the Sovetsky district in the Khanty-Mansi Autonomous District of Khanty-Mansi Autonomous Okrug; the northern sector is in the Beryozovsky District. The reserve was created in 1976, and covers an area of 225,562 ha (870.90 sq mi).