The Chüy Valley (Kyrgyz: Чүй өрөөнү, romanized: Chüy Öröönü;[1] Kazakh: Шу аңғары, romanized: Şu añğary; Russian: Чуйская долина[2]) is a large valley located in northern Kyrgyzstan and southern Kazakhstan, in the northern part of the Tian Shan.

It borders Kyrgyz Ala-Too in the south, and Chu-Ili mountains in the north.

[3] The warm summer and availability of drinking and irrigation water makes this area one of the most fertile and most densely populated regions of Kyrgyzstan.

[5] The 2006 World Drug Report estimated that 400,000 hectares of cannabis grow wild in the Chüy Valley.

The typical annual precipitation varies from 300 to 500 millimetres (12 to 20 in) in different climatic zones of the valley.