Wuchang is a county-level city under the jurisdiction of Harbin, the capital of Heilongjiang province, People's Republic of China. The southernmost county-level division of Harbin City, it borders Acheng District to the north, Shangzhi to the northeast, Shuangcheng District to the northwest, and Jilin Province to the south and the west.

The name "Wuchang" has been in use since 1855. At that time people began to reclaim wasteland, and built five noble lodges. It was changed to Wuchang Bureau in 1882, and changed to Wuchang Mansion in 1909. In 1913 Wuchang County was set up. It was changed to Wuchang City in 1993.

The area of Wuchang is 7,512 km2, and it had 979,627 population at the end of 2008.

Wuchang has many advantages for agriculture, such as loamy soil, abundant water, and suitable weather. Grain crops dominate the mix such as rice, corn, soybean, sorghum, cereal and wheat. Other crops that contribute to the local economy include beet and tobacco. The short-grain rice produced in the Wuchang area is considered to be some of the best rice in China.