Srednekolymsky District (Russian: Среднеколы́мский улу́с; Sakha: Орто Халыма улууһа) is an administrative and municipal district (raion, or ulus), one of the thirty-four in the Sakha Republic, Russia. It is located in the north of the republic and borders with Verkhnekolymsky District in the south, Abyysky District in the west, Allaikhovsky District in the northwest, Nizhnekolymsky District in the north, Chukotka Autonomous Okrug in the east, and with Magadan Oblast in the southeast. The area of the district is 125,200 square kilometers (48,300 sq mi). Its administrative center is the town of Srednekolymsk. Population: 7,897 (2010 Census); 8,353 (2002 Census); 9,441 (1989 Census).