Ardatovsky District (Russian: Арда́товский 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 1,887.6 square kilometers (728.8 sq mi).

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

[7] The population of Ardatov accounts for 36.2% of the district's total population.