Ji'an is a prefecture-level city situated in the central region of Jiangxi province of the People's Republic of China while bordering Hunan province to the west. It has an area of 25,219 km² and as of the 2010 census, had a population of 4,810,339, of whom 538,699 live in the built-up area made of 2 urban districts. Ji'an lies next to the Luoxiao Mountains with the Gan River running through the middle of the city. Local dialects include a form of Gan Chinese as well as Hakka Chinese.
Ji'an is an abbreviation of its original name "吉泰民安". It has also formerly been known as Luling and Jizhou.