The Oloy River (Russian: Олой) is a river in Magadan Oblast in Russia, a right tributary of the Omolon River (Kolyma's basin). The length of the river is 471 kilometres (293 mi). The area of its drainage basin is 23,100 km². It flows roughly northwestwards and passes through the sparsely populated areas of Chukotka. This river meets the Kolyma at Kryukovo.