Mao County or Maoxian (Chinese: 茂县; Tibetan: མའོ་རྫོང་།; Qiang: Shgvunyi) is a county in Ngawa Prefecture, Sichuan Province, China.
It has an area of 3,903 and a population of 106,700 as of 2006. 88.9% of the population are Qiang people. The county seat is Fengyi Town.
In 1933, an earthquake occurred near Diexi.
In 2017, a landslide occurred in Xinmo Village (新磨村), Diexi.