Ji'an is a prefecture-level city located in the central region of Jiangxi province in the People's Republic of China. It shares a western border with Hunan province and covers a total area of 25,219 square kilometers. As of the 2020 census, the city had a population of 4,469,176, with 643,399 residents living within its two urban districts.
The geography of the city is defined by its proximity to the Luoxiao Mountains and the Gan River, which flows through the center of the city. The local population speaks several dialects, including Hakka Chinese and a form of Gan Chinese.