The Kam–Sui languages (Chinese: 侗水語支; pinyin: Dòng-Shǔi) are a branch of the Tai–Kadai languages spoken by the Kam–Sui peoples. They are spoken mainly in eastern Guizhou, western Hunan, and northern Guangxi in southern China. Small pockets of Kam–Sui speakers are also found in northern Vietnam and Laos.