Yefremov (Russian: Ефре́мов, Russian pronunciation: [jɪˈfrʲeməf]) is a town and the administrative center of Yefremovsky District in Tula Oblast, Russia, located on the Krasivaya Mecha River (Don's tributary), 149 kilometers (93 mi) south of Tula, the administrative center of the oblast.

[9] It was founded in 1637 as a fortress defending the southern borders of the Tsardom of Russia.

[citation needed] Yefremov was occupied by the German Army briefly during World War II.

[citation needed] Within the framework of administrative divisions, Yefremov serves as the administrative centre of Yefremovsky District[1] and is incorporated within it as a town under district jurisdiction.

[5][3] Since 1933 the Yefremovskaya CHP has been operating, which supplies industrial enterprises with electricity and the city with heat.