| Sonid Left Banner | |
| Settlement Type: | Banner |
| Image Map1: | Location of Xilin Gol League within Inner Mongolia (China).svg |
| Map Caption1: | Xilin Gol in Inner Mongolia |
| Pushpin Map: | Inner Mongolia#China |
| Pushpin Label: | Sonid Left |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location of the seat in Inner Mongolia |
| Subdivision Type: | Country |
| Subdivision Name: | China |
| Subdivision Type1: | Autonomous region |
| Subdivision Name1: | Inner Mongolia |
| Subdivision Type2: | League |
| Subdivision Name2: | Xilin Gol |
| Seat Type: | Banner seat |
| Seat: | Mandalt |
| Area Total Km2: | 34,250 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 33,643 |
| Population Density Km2: | auto |
| Timezone: | China Standard |
| Utc Offset: | +8 |
| Coordinates: | 43.86°N 113.667°W |
| Postal Code Type: | Postal code |
| Mon: | Сөнөд зүүн хошуу |
| Monr: | Söned Jegün qosiɣu |
| Order: | st |
| S: | 苏尼特左旗 |
| T: | 蘇尼特左旗 |
| P: | Sūnítè Zuǒqí |
Sonid Left Banner (Mongolian: ;) is a banner of north-central Inner Mongolia, China, bordering the Mongolian provinces of Dornogovi to the west and Sükhbaatar to the north. It is under the administration of Xilingol League. Sunud Mongols live here.
Sonid Left Banner is divided into 3 towns and 4 sums.
| Name | Simplified Chinese | Hanyu Pinyin | Mongolian (Hudum Script) | Mongolian (Cyrillic) | Administrative division code |
|---|---|---|---|---|---|
| Towns | |||||
| Mandalt Town | Chinese: 满都拉图镇 | Mongolian: Мандалт балгас | 152523100 | ||
| Qagan Obo Town | Chinese: 查干敖包镇 | Mongolian: Цагаан-Овоо балгас | 152523101 | ||
| Bayan Nur Town | Chinese: 巴彦淖尔镇 | Mongolian: Баяннуур балгас | 152523102 | ||
| Sums | |||||
| Bayan Ul Sum | Chinese: 巴彦乌拉苏木 | Mongolian: Баян-Уул сум | 152523200 | ||
| Saihan Gobi Sum | Chinese: 赛罕高毕苏木 | Mongolian: Сайханговь сум | 152523201 | ||
| Honggor Sum | Chinese: 洪格尔苏木 | Mongolian: Хонгор сум | 152523202 | ||
| Dalai Sum | Chinese: 达来苏木 | Mongolian: Далай сум | 152523203 | ||
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 monthly 24-hour mean temperature in January, the coldest month, is NaN°C, and in July, the warmest month, 22°C, with the annual mean at 3.07°C. The annual precipitation is 185mm, with more than half of it falling in July and August alone.