Kiyasovsky District (Russian: Кия́совский райо́н; Udmurt: Кияса ёрос, Kijasa joros) is an administrative[1] and municipal[6] district (raion), one of the twenty-five in the Udmurt Republic, Russia.

It is located in the south of the republic.

The area of the district is 821.3 square kilometers (317.1 sq mi).

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

[9] The population of Kiyasovo accounts for 31.1% of the district's total population.