| En Name: | Yadrinsky District |
| Ru Name: | Ядринский район |
| Loc Name1: | Eтĕрне районӗ |
| Loc Lang1: | Chuvash |
| Image View: | Чувашия, Ядринский район, река Сура - panoramio (2).jpg |
| Coordinates: | 55.597°N 46.356°W |
| Federal Subject: | Chuvash Republic |
| Adm Data As Of: | December 2011 |
| Adm Ctr Type: | town |
| Adm Ctr Name: | Yadrin |
| Town Of District Significance Type: | Urban settlements |
| No Of Towns Of District Significance: | 1 |
| Selsoviet Type1: | Rural settlements |
| No Of Selsoviets Type1: | 17 |
| No Of Cities Towns: | 1 |
| No Of Rural Localities: | 125 |
| Mun Data As Of: | November 2011 |
| Mun Formation1: | Yadrinsky Municipal District |
| Mun Formation1 No Of Urban Settlements: | 1 |
| Mun Formation1 No Of Rural Settlements: | 17 |
| Area Km2: | 897.5 |
| Pop 2010Census: | 29965 |
| Urban Pop 2010Census: | 32.1% |
| Rural Pop 2010Census: | 67.9% |
| Established Date: | September 5, 1927 |
| Website: | http://gov.cap.ru/main.asp?govid=78 |
| Date: | October 2011 |
Yadrinsky District (ru|Я́дринский райо́н; cv|Етĕрне районӗ, Yetĕrne rayonĕ) is an administrative[1] and municipal[2] district (raion), one of the twenty-one in the Chuvash Republic, Russia. It is located in the northwest of the republic and borders with the Mari El Republic in the north, Morgaushsky District in the east, Alikovsky and Krasnochetaysky Districts in the south, and with Nizhny Novgorod Oblast in the west. The area of the district is 897.5km2.[3] Its administrative center is the town of Yadrin. Population: The population of Yadrin accounts for 32.1% of the district's total population.
The district was established on September 5, 1927 with the merger of 5 municipalities (Leninskaya, Baldaevskaya, Malokarachkinskaya, Toraevskaya and Shumatovskaya) and the city of Yadrin. The first head of the district was Alexander Ivanovich Markov.
The Mayor of the city - Andrey Vladimirovich Agakov (start 05.12.2011). The Deputy - Larisa Polikarpova.
According to the 2010 Census, Chuvash make up 84% of the district population. Other groups include Russians (15%), and a host of smaller groups.