Aksubayevsky District (Russian: Аксуба́евский райо́н; Tatar: Аксубай районы) is a territorial administrative unit and municipality of the Republic of Tatarstan within the Russian Federation. The district is located in the south of the Republic of Tatarstan, in the Zakamsk economic region. The administrative center of the district is the urban-type settlement Aksubaevo. The Aksubayevsky district is the only district in the republic where the Chuvash population is the prevailing ethnic group by comparison to the Tatar and Russian population of the district.