The Bouyei (also spelled Puyi, Buyei and Buyi; Bouyei: Buxqyaix, [puʔjai] or "Puzhong", "Burao", "Puman"; Chinese: 布依族; pinyin: Bùyīzú; Vietnamese: người Bố Y) are an ethnic group living in Southern Mainland China. Numbering 3.5 million, they are the 10th largest of the 56 ethnic groups officially recognized by the People's Republic of China. Some 3,000 Bouyei also live in Northern Vietnam, where they are one of that nation's 54 officially recognized ethnic groups.

The Bouyei consist of various subgroups. Below are their autonyms written in the International Phonetic Alphabet with numerical Chao tones.

Some clans within the Bouyei groups include:

In Congjiang County, Guizhou, there is a group that refer to themselves as "Buyeyi, 布也益", but are officially classified by the Chinese government as ethnic Zhuang.

The Bouyei primarily live in the Qianxinan and Qiannan prefectures of southern Guizhou Province, as well as in Yunnan and Sichuan provinces and the Guangxi Zhuang Autonomous Region. Economic migration has also led to Bouyei communities in coastal provinces such as Zhejiang, Guangdong, Fujian and Jiangsu.

In Vietnam, they are located in Mường Khương District of Lào Cai and Quản Bạ District of Hà Giang Province.

The Census of 2020 recorded 3,576,752 Bouyei in China.

(Only includes counties or county-equivalents containing >0.1% of China's Bouyei population.)