Tetyushi (Russian: Тетю́ши; Tatar: Тәтеш) is a town and the administrative center of Tetyushsky District in the Republic of Tatarstan, Russia, located on the right bank of the Volga River, on the shore of the Kuybyshev Reservoir, 180 kilometers (110 mi) south of Kazan, the capital of the republic.

[2] The town was the site of a major battle during Stepan Razin's rebellion.

The base of Severodvinian stage of the Tatarian series of the Permian period (subdivisions valid only in Russian stratigraphic chart) is defined in the Monastyrskii ravine, near Tetyushi.

[4] As of 1997, the town's industrial enterprises included a meat factory, a dairy, a bakery, a brewery, a fish processing, plant, a furniture plant, an animal feedstuff factory, and a branch of the Kazan Helicopters company.

[2] The nearest railway station is Bua on the Ulyanovsk–Sviyazhsk line, 45 kilometers (28 mi) west of Tetyushi.