Kizilsky District (; , ) is an administrative and municipal district (raion), one of the twenty-seven in Chelyabinsk Oblast, Russia. It is located in the southwest of the oblast. The area of the district is . Its administrative center is the rural locality (a selo) of Kizilskoye. Population: 27,679 (2002 Census); The population of Kizilskoye accounts for 25.7% of the district's total population.