Apastovsky District (Russian: Апа́стовский райо́н; Tatar: Апас районы) is a territorial administrative unit and municipal district of the Republic of Tatarstan within the Russian Federation. The district is located in the southwest of the region. The territory of the district includes 72 settlements. As of 2020, 19,512 people reside in the region. Administrative centre is the urban-type settlement Apastovo.