Yongding (Chinese: 永定) is a district under the jurisdiction of Longyan prefecture-level city in the southwest of Fujian Province, People's Republic of China. The district is a center for Hakka culture, including the traditional Hakka tulou, and a local dialect of the Hakka Chinese called the Yongding Dialect [zh]. As of 2015, Yongding has a permanent population of about 361,000,: 40 of which more than 99% are Hakka, the rest being She people. In December 2014, the Fujian government signed legislation converting Yongding from a county to a district.
Yongding is the hometown of many overseas Chinese immigrants that came to south-east Asia and Burma during the British Raj.