Yongxiu (Chinese: 永修; pinyin: Yǒngxiū) is a county under the administration of Jiujiang City in northern Jiangxi province, People's Republic of China, on the western shores of Poyang Lake.

As of 2005[update], the county has a total population of 361,000 residing in an area of 2,035 square kilometres (786 sq mi).

Bordering counties are Duchang, Xingzi, De'an, Wuning, Jing'an, Xinjian, and Anyi, while the county seat is 40 kilometres (25 mi) north of Nanchang, the provincial capital, and 80 km (50 mi) south-southwest of downtown Jiujiang.

[1] The county has 11 towns:[2] There are 4 townships:[2] The Yongxiu County seat is 18 km (11 mi) north-northeast of Nanchang Changbei International Airport, and 50 km (31 mi) south of Jiujiang Lushan Airport.

Due to its importance in north–south travel in the province, Yongxiu was known as the "Gate of Hongdu" (洪都門戶) in ancient China.