Bolsherechensky District (Russian: Большере́ченский райо́н) is an administrative and municipal district (raion), one of the thirty-two in Omsk Oblast, Russia. It is located in the center of the oblast. The area of the district is 4,300 square kilometers (1,700 sq mi). Its administrative center is the urban locality (a work settlement) of Bolsherechye. Population: 28,486 (2010 Census); 34,037 (2002 Census); 36,726 (1989 Census). The population of Bolsherechye accounts for 39.6% of the district's total population.