Visokoi Island is an uninhabited island in the Traversay Islands group of the South Sandwich Islands. It was discovered in 1819 by a Russian expedition under Fabian Gottlieb von Bellingshausen, who initially named the island Thorson Island in honor of Lieutenant , though the tsarist government later renamed the island Visokoi ("high"), after its conspicuous height, in response to Thorson's participation in the Decembrist revolt. The island was surveyed in 1930 by Discovery Investigations (DI) personnel, who charted and named many of its features. Several of the names given by DI were changed in 1953 by the United Kingdom Antarctic Place-Names Committee (UK-APC) to avoid redundancy with nearby features.