Duchang County
Duchang County 
    都昌县  | |
|---|---|
Location of Duchang County (red) within Jiujiang City (yellow) and Jiangxi  | |
| Coordinates: 29°16′23″N 116°12′14″E / 29.273°N 116.204°E | |
| Country | People's Republic of China | 
| Province | Jiangxi | 
| Prefecture-level city | Jiujiang | 
| Area | |
 • Total  | 2,669.5 km2 (1,030.7 sq mi) | 
| Population  (2018)  | |
 • Total  | 816,900 | 
| • Density | 310/km2 (790/sq mi) | 
| Time zone | UTC+8 (China Standard) | 
| Postal code | 332600  | 
Duchang (Chinese: 都昌; pinyin: Dūchāng) is a county in the north-northeast of Jiangxi province, People's Republic of China. Containing part of Poyang Lake, it is under the jurisdiction of the prefecture-level city of Jiujiang. The total area is 2,669.53 km2 (1,030.71 sq mi), and the population is 813,000.