Kolyuchin Bay (Russian: Колючинская губа; Kolyuchinskaya guba) is a large bay in the Chukchi Sea on the northern shore of the Chukotka Peninsula, Russia.

Administratively this bay belongs to the Chukotka Autonomous Okrug of the Russian Federation.

The width increases to 37 km as it goes southwards and inland.

[1] The locals could not get accustomed to this name and the bay was later renamed Kolyuchinskaya after nearby Kolyuchin Island.

This Chukotka Autonomous Okrug location article is a stub.