Jung District () is a gu (district) in south-central Ulsan, South Korea. Most of the population lives between the southern border of the Taehwa River and Ring Road. The current head of the district is .
As of July 1, 2024, Jung District had 94,357 households and a population of 208,568, with 105,484 males and 103,084 females.
Jung District is organized into the following dong (neighborhoods):
Seongnam-dong in central Jung District is generally regarded as the center of Ulsan. Other local attractions include Dongheon (), an old complex used by the Japanese as a base of government during the occupation of Korea; Hyanggyo (), an old Confucian academy; Byeongyeongseong (), remnants of an old hill fortress; Hakseong Park (), an ancient hilltop stupa that is the only one in South Korea to have the oriental zodiac figures carved around its base; and Ulsan Central Market, the largest traditional market in Ulsan.