Kolyuchin Island or Koliuchin Island is a small island in the Chukchi Sea. It is not far from the coast, being only 11 km (6.8 mi) from the northern shore of the Chukotka Peninsula. Its latitude is 67° 28' N and its longitude 174° 37' E.
This island is 4.5 km (2.8 mi) in length and its maximum width is 1.5 km (0.93 mi). It is covered with tundra vegetation. There was a small Chukchi settlement on the southern end of the island called Kolyuchino but as of 1987, there was no village and very rare traces of former human presence such as separate logs and coals.
On the nearby shore there is the settlement of Nutepel'men, located north of the Rypatynonel'gyn Lagoon and south of the Pyngopil'gyn Lagoon. Kolyuchinskaya Bay, further south, is named after Kolyuchin Island. Administratively this island and its surrounding area belongs to the Chukotka Autonomous Okrug of the Russian Federation.