Sayansk (Russian: Саянск, IPA: [sɐˈjansk]) is a town in Irkutsk Oblast, Russia, located on the Oka River (Angara River's basin) 270 kilometers (170 mi) northwest of Irkutsk.

[8] Sayansk was founded in 1970.

[citation needed] It was granted urban-type settlement status in 1975 and town status in 1985.

[citation needed] Within the framework of administrative divisions, it is incorporated as the Town of Sayansk[1]—an administrative unit with the status equal to that of the districts.

[citation needed] As a municipal division, the Town of Sayansk is incorporated as Sayansk Urban Okrug.