Ngawa Tibetan and Qiang Autonomous Prefecture
Ngawa Tibetan and Qiang Autonomous Prefecture, also known as Aba (; Qiang: Ggabba Shbea Rrmea nyujugvez zhou; ), is an autonomous prefecture of northwestern Sichuan, bordering Gansu to the north and northeast and Qinghai to the northwest. Its seat is in Barkam, and it has an area of . The population was 919,987 in late 2013.