Tsivilsk, also rendered Tzivilsk or Civilsk,[a] is a town and the administrative center of Tsivilsky District of the Chuvash Republic, Russia, located 37 kilometers (23 mi) from the republic's capital city of Cheboksary, at the crossroads of the highways from Nizhny Novgorod to Kazan and from Tsivilsk to Ulyanovsk.

[9] The original fortress at Tsivilsk was founded in 1589 as a Russian military outpost among the Chuvash population.

[1] As an administrative division, it is incorporated within Tsivilsky District as Tsivilskoye Urban Settlement.

[1] As a municipal division, this administrative unit also has urban settlement status and is a part of Tsivilsky Municipal District.

[5] There is a 350-meter (1,150 ft) tall guyed mast used for FM- and TV-broadcasting in the town.