Xishuangbanna, sometimes shortened to Banna, is an autonomous prefecture for Dai people in the extreme south of Yunnan Province, China, bordering both Myanmar and Laos. The prefectural seat is Jinghong, the largest settlement in the area and one that straddles the Mekong, called the "Lancang River" in Chinese.

The Dai people are several Tai-speaking ethnic groups living in the Xishuangbanna Dai Autonomous Prefecture and the Dehong Dai and Jingpo Autonomous Prefecture of China's Yunnan Province. The Dai people form one of the 56 ethnic groups officially recognized by the People's Republic of China. By extension, the term can apply to groups in Laos, Vietnam, Thailand and Myanmar when Dai is used to mean specifically Tai Yai, Lue, Chinese Shan, Tai Dam, Tai Khao or even Tai in general. For other names, see the table below.