The Kam–Sui peoples are a group of related ethnic groups in China and neighboring portions of Northern Laos and Vietnam. They are defined as speakers of Kam–Sui languages, which belong linguistically to the Kra–Dai languages.

Kam–Sui of China

Cao Miao people

The Cao Miao people of Guizhou, Hunan and Guangxi Provinces speak a Kam-Sui language called Mjiuniang, although it is believed that the people are of Hmong–Mien descent.

Biao people

Whether or not the Biao people of China are of Kam-Sui descent is an issue of present debate in the scientific community. They are, however, a Tai ethnic group.

Kang people

The Kang people of Yunnan Province (referred to as Tai Khang in Laos) speak a Kam–Sui language, but ethnically descend from the Dai people.

Kam–Sui of Vietnam

The following Kam–Sui ethnic groups originating in China have population clusters in Vietnam:

Tai Khang people of Laos

The Tai Khang people of Laos (referred to as Kang in China) speak a Kam–Sui language, but ethnically descend from the Dai people.