|Country||People's Republic of China|
|County seat||Chengguan (城关镇)|
|• County||3,331 km2 (1,286 sq mi)|
|Elevation||2,300 m (7,500 ft)|
|4,154 m (13,629 ft)|
|Lowest elevation||1,138 m (3,734 ft)|
|• Density||96/km2 (250/sq mi)|
|Time zone||UTC+8 (China Standard)|
Tanchang (Chinese: 宕昌; pinyin: Tànchāng), also pronounced Dàngchāng, is a county in the south of Gansu province, China. It is the westernmost county-level division of the prefecture-level city of Longnan. In 2017 its population was 319,400 people.
-Towns are upgraded from Township.
-Towns are established newly.
-Township is established newly.
- Hejiabao Township(何家堡乡)
-Former Townships are merged to other.
- Official website (Chinese)