Yadrin (Russian: Я́дрин; Chuvash: Етӗрне, Yetĕrne) is a town and the administrative center of Yadrinsky District of the Chuvash Republic, Russia.

Yadrin is located on the left bank of the Sura River, 86 kilometers (53 mi) southwest of Cheboksary, the capital of the republic.

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

The population of Yadrin peaked in 1996 at 11,000, and has since declined steadily.

[citation needed] Notable people born in Yadrin include: