Vachsky District (Russian: Ва́чский райо́н) is an administrative district (raion), one of the forty in Nizhny Novgorod Oblast, Russia.

[4] It is located in the southwest of the oblast.

The area of the district is 979.5 square kilometers (378.2 sq mi).

[1] Its administrative center is the urban locality (a work settlement) of Vacha.

[7] The population of Vacha accounts for 30.0% of the district's total population.