| En Name: | Yadrin |
| Ru Name: | Ядрин |
| Loc Name1: | Етĕрне |
| Loc Lang1: | Chuvash |
| Coordinates: | 55.9333°N 58°W |
| Map Label Position: | right |
| Image Coa: | Герб Ядрина 1989.jpg |
| Federal Subject: | Chuvash Republic |
| Adm District Jur: | Yadrinsky District |
| Adm Selsoviet Jur: | Yadrinskoye |
| Adm Selsoviet Type: | Urban settlement |
| Adm Ctr Of1: | Yadrinsky District |
| Adm Ctr Of2: | Yadrinskoye Urban Settlement |
| Inhabloc Cat: | Town |
| Mun District Jur: | Yadrinsky Municipal District |
| Urban Settlement Jur: | Yadrinskoye Urban Settlement |
| Mun Admctr Of1: | Yadrinsky Municipal District |
| Mun Admctr Of2: | Yadrinskoye Urban Settlement |
| Pop 2010Census: | 9614 |
| Established Date: | 1590 |
| Current Cat Date: | 1781 |
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, 86km (53miles) southwest of Cheboksary, the capital of the republic. Population:
Yadrin was founded in 1590 as a fortified settlement. It was granted town status in 1781.
Within the framework of administrative divisions, Yadrin serves as the administrative center of Yadrinsky District.[1] As an administrative division, it is incorporated within Yadrinsky District as Yadrinskoye Urban Settlement. As a municipal division, this administrative unit has urban settlement status and is a part of Yadrinsky Municipal District.[2]
The Russian Federation Census 2010 reported a resident population for Yadrin of 9,614, a 5% decline from the 1989 census. The population of Yadrin peaked in 1996 at 11,000, and has since declined steadily.
The population of Yadrin consists mainly of the two following ethnic groups; the Chuvash (67%), and ethnic Russians (31%).
Yadrin has several factories and development bases of the companies of heavy and food industry (e.g., Yadrin machinery plant, Yadrin factory of metal products, YMZ-Energy, Yadrin garment factory, Yadrin meat-packing plant).The town has branches of the following banks: Sberbank of Russia, Rosselkhozbank, Rosgosstrakh Bank.
In Yadrin are 3 schools, a sport school and the Palace children's creativity.
Notable people born in Yadrin include: