Garzê County or Kardze County[2] (Tibetan: དཀར་མཛེས་རྫོང་།, Wylie: dkar mdzes rdzong), called Ganzi County in Chinese (Chinese: 甘孜县; pinyin: Gānzī xiàn), is one of the 18 subdivisions of the Garzê Tibetan Autonomous Prefecture, in northwestern Sichuan province, China.

Historically, it is part of the Tibetan cultural region of Kham and now defunct province of Xikang (or Sikang).

Due to its elevation, Garzê County has a monsoon-influenced humid continental climate (Köppen Dwb) and subarctic climate, with cold but very dry winters, and warm summers with frequent rain.

The monthly 24-hour average temperature ranges from −3.9 °C (25.0 °F) in January to 14.2 °C (57.6 °F) in July, while the annual mean is 5.93 °C (42.7 °F).

Over two-thirds of the annual precipitation of 646 mm (25.4 in) occurs from June thru September.