Sonid Left Banner (Mongolian: ᠰᠥᠨᠡᠳ ᠵᠡᠭᠦᠨ ᠬᠣᠰᠢᠭᠤ; Chinese: 苏尼特左旗) is a banner of north-central Inner Mongolia, China, bordering the Mongolian provinces of Dornogovi to the west and Sükhbaatar to the north.

Sonid Left Banner is divided into 3 towns and 4 sums.

Others: Sonid Left Banner features a cold semi-arid climate (Köppen BSk), marked by long, cold and very dry winters, hot, somewhat humid summers, and strong winds, especially in spring.

The annual precipitation is 185 millimetres (7.28 in), with more than half of it falling in July and August alone.

This Inner Mongolia location article is a stub.