Jinju, city, South Gyeongsang do (province), southern South Korea. It is situated west of Changwon along the Nam River, a tributary of the Nakdong River. It was the center of local administration beginning in the Three Kingdoms period (c. 57 bce–668 ce), under various names, and from 1896 to 1925 it was the capital of the province, after which the capital was moved to Busan. Jinju is a transportation junction connecting the surrounding provinces and is the economic and cultural center of the western counties of South Gyeongsang province. Gyeongsang National University is located there. Northwest of the city, a national park encompasses Mount Jiri (Jirisan; 6,283 feet [1,915 meters]) and the surrounding area. Jinju has many historical remains, including Jinju Castle (originally built early 11th century, since reconstructed) and several Buddhist temples. Pop. (2020) 352,403.