Uljin County (Uljin-gun; Korean: 울진군) is a county in North Gyeongsang Province, South Korea. Before 1963, Uljin was in Gangwon Province. It borders the Sea of Japan in the east, Bonghwa-gun and Yeongyang-gun in the west, Yeongdeok-gun in the south, and Samcheok-si, Gangwon-do in the north. It is located at 129°04'∼129°29' east longitude and 36°38'∼37°06' north latitude. The area is 989.43 square kilometers, and the population is 51,885 (as of 2015). There are 2 eups, 8 myeons, and 195 administrative districts (79 Beopjeong-ri). The county office is located in Eupnae-ri, Uljin-eup, Uljin-gun, Gyeongsangbuk-do.
