Yakov Permyakov (Russian: Яков Пермяков; died 1712) was a Russian seafarer, explorer, merchant, and Cossack. In 1710, while sailing from the Lena River to the Kolyma River, Permyakov observed the silhouette of two unknown island groups in the sea. Those islands would later be called Bolshoy Lyakhovsky and the Medvyezhi Islands.