Dolgy Island is an island in the
Pechora Sea, east of the
Khaypudyr Bay. Long and narrow, this island is in length, with an average width of . 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.