Qianxi (Chinese: 黔西市; pinyin: Qiánxī Shì) is a county-level city of western Guizhou province, China.

The area of Qianxi has been inhabited since prehistoric times, as evidenced by stone tools found in the Guanyin cave among others.

Due to its low latitude and elevation above 1,200 m (3,900 ft), Qianxi has a monsoon-influenced humid subtropical climate (Köppen Cwa), with hot, humid summers (though devoid of extreme heat) and cool, damp winters.

The monthly 24-hour average temperature ranges from 3.8 °C (38.8 °F) in January to 23.1 °C (73.6 °F) in July, while the annual mean is 14.24 °C (57.6 °F).

Rainfall is extremely common year-round, occurring on 187 days of the year (i.e. slightly more than half of the days), but over half of the annual total occurs from June to August.