Abag Banner (Mongolian: ᠠᠪᠠᠭ᠎ᠠ ᠬᠣᠰᠢᠭᠤ; Chinese: 阿巴嘎旗) is a county of Inner Mongolia, China. It is under the administration of Xilingol League. Abaga and Abaganar Mongols live here. The local dialect has variously been classified as Chakhar or Khalkha.

Abag Banner is divided into 3 towns and 4 sums.

Other: Manit Coal Mine (玛尼图煤矿)(ᠮᠠᠨᠢᠲᠤ ᠨᠡᠭᠦᠷᠡᠰᠦᠨ ᠠᠭᠤᠷᠬᠠᠢ)

Abag Banner has a monsoon-influenced, continental semi-arid climate (Köppen BSk), with very cold and dry winters, very warm, somewhat humid summers, and strong winds, especially in spring. The monthly 24-hour average temperature ranges from −20.9 °C (−5.6 °F) in January to 21.3 °C (70.3 °F) in July, with the annual mean at 1.93 °C (35.5 °F). The annual precipitation is 238 mm (9.4 in), with more than half of it falling in July and August alone. There are 3,017 hours of bright sunshine annually, with each of the winter months having over two-thirds of the possible total, and this percentage falling to 60 in July.