Yustinsky District (Russian: Юсти́нский райо́н; Kalmyk: Үстин район, Üstin rayon) is an administrative[1] and municipal[3] district (raion), one of the thirteen in the Republic of Kalmykia, Russia.

It is located in the northeast and east of the republic.

The area of the district is 7,995.61 square kilometers (3,087.12 sq mi).

[1] Its administrative center is the rural locality (a settlement) of Tsagan Aman.

[1] Within the framework of administrative divisions, Yustinsky District is one of the thirteen in the Republic of Kalmykia.