Bilibino (Russian: Били́бино) is a town and the administrative center of Bilibinsky District of Chukotka Autonomous Okrug, Russia, located at the confluence of the Karalveyem and the Bolshoy Keperveyem Rivers (Kolyma's basin), 653 kilometers (406 mi) northwest of Anadyr. It is the second largest town in Chukotka; population: 5,504 (2010 Census preliminary results); 6,181 (2002 Census); 15,558 (1989 Census).).