Dolgy Island (Russian: остров До́лгий) is an island in the Pechora Sea, east of the Khaypudyr Bay. Long and narrow, this island is 38 kilometres (24 mi) in length, with an average width of 2.8 kilometres (1.7 mi). It stretches roughly from north-west to south-east and there are smaller islands at both of its ends, Matveyev Island in the north and Bolshoy Zelenets and Maly Zelenets in the south, which are a prolongation of the same submarine structure.