| Dong'an County | |
| Other Name: | Tungan |
| Postal Code Type: | Postal code |
| Postal Code: | 4259XX |
| Settlement Type: | County |
| Pushpin Map: | China Hunan |
| Pushpin Label: | Dong'an |
| Pushpin Map Caption: | Location in Hunan |
| Subdivision Type: | Country |
| Subdivision Name: | People's Republic of China |
| Subdivision Type1: | Province |
| Subdivision Name1: | Hunan |
| Subdivision Type2: | Prefecture-level city |
| Subdivision Name2: | Yongzhou |
| Seat: | Baiyashi |
| Area Footnotes: | [1] |
| Area Total Km2: | 2210.94 |
| Population Footnotes: | [2] |
| Population Total: | 543453 |
| Population As Of: | 2010 |
| Population Density Km2: | auto |
| Coordinates: | 26.397°N 111.3°W |
| Timezone: | China Standard |
| Utc Offset: | +8 |
Dong'an County is a county of Hunan Province, China, it is under the administration of Yongzhou prefecture-level City.
Located on the south central margin of the province, it is adjacent to the eastern border of Guangxi. The county is bordered to the north by Shaoyang County, to the east by Lengshuitan District, to the south by Lingling District, Quanzhou County of Guangxi, to the west and the northwest by Xinning County. Dong'an County covers 2204km2, as of 2015, It had a registered population of 643,179.[3] The county has 13 towns and 2 townships under its jurisdiction, the county seat is Baiyashi (Chinese: 白牙市镇).[4]
Dong'an County is the source place of Dong'an Chicken (Chinese: 东安子鸡), which is one of well-known Hunan foods.