Ulagansky District (Russian: Улага́нский райо́н; Altay: Улаган аймак, Ulagan aymak) is an administrative[1] and municipal[5] district (raion), one of the ten in the Altai Republic, Russia.

[3] Its administrative center is the rural locality (a selo) of Ulagan.

[4] Altai make up 57.2% of the district's population, followed by Russians (20.2%), Telengits (16.3%), Kazakhs (4.5%) and Uzbeks (1.8%).

[3] A large part of the district along the mountainous eastern border is in the Altai Nature Reserve.

[11] Within the framework of administrative divisions, Ulagansky District is one of the ten in the Altai Republic.