Belkovsky Island (Бельковский остров in Russian) is the westernmost island of the Anzhu Islands subgroup of the New Siberian Islands archipelago in the Laptev Sea. The strait between Belkovsky Island and neighboring Kotelny Island is known as the Zarya Strait, after Eduard Toll's Zarya (polar ship). Ostrov Strizhëva is a small islet located right off Belkovsky's southern shore.
Belkovsky Island's area is approximately 500 km² in area. The highest point of the island is 120 m.
Administratively, Belkovsky Island is a part of the Sakha Republic of the Russian Federation.