Yadrinsky District (Russian: Я́дринский райо́н; Chuvash: Етĕрне районӗ, Yetĕrne rayonĕ) is an administrative[1] and municipal[4] 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 897.5 square kilometers (346.5 sq mi).

[3] 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 Mayor of the city - Andrey Vladimirovich Agakov (start 05.12.2011).