Ardatovsky District (Russian: Арда́товский райо́н; Erzya: Орданьбуе Ordańbuje; Moksha: Ардатовань аймак, Ardatovań ajmak) is an administrative[1] and municipal[6] district (raion), one of the twenty-two in the Republic of Mordovia, Russia.

The area of the district is 1,192.5 square kilometers (460.4 sq mi).

[4] Within the framework of administrative divisions, Ardatovsky District is one of the twenty-two in the republic.

[1] It is divided into one town of district significance (Ardatov), one work settlement (an administrative division with the administrative center in the work settlement (inhabited locality) of Turgenevo), and twenty-one selsoviets, all of which comprise fifty-four rural localities.

[6] The town of district significance of Ardatov and Turgenevo Work Settlement are incorporated into two urban settlements, and the twenty-one selsoviets are incorporated into twenty-one rural settlements within the municipal district.