Danjiangkou Reservoir (simplified Chinese: 丹江口水库; traditional Chinese: 丹江口水庫; pinyin: Dānjiāngkǒu Shuǐkù) is a multi-purpose reservoir in Xichuan County, Henan and Danjiangkou City, Hubei province, Central China.

Created by the Danjiangkou Dam, it serves as a supply of water for the region as well as for irrigation, electricity generation, flood control and aquaculture.

[3] The ruins of the ancient city of Junzhou (Chinese: 均州城) were also flooded.

[5] Between 2005 and 2009, the dam was raised to facilitate the connection to the South-North Water Transfer Project.

After measures to combat overfishing were introduced, populations of black carp, fishes of the genus Xenocypris, Chinese perch, Yellow catfish, wild ducks, egrets and otters have recovered.