Zavyalovsky District (Russian: Завья́ловский райо́н; Udmurt: Завьял ёрос / Дэри ёрос, Zavjal joros / Deri joros) is an administrative[1] and municipal[5] district (raion), one of the twenty-five in the Udmurt Republic, Russia.

It is located in the southern central part of the republic.

The area of the district is 2,203.3 square kilometers (850.7 sq mi).

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

[8] The population of Zavyalovo accounts for 13.6% of the district's total population.