Pyongtaek, city (2016 pop. 470,832), Gyeonggi prov., NW South Korea, 45 mi (70 km) S of Seoul. In a rice, fruit, and dairy farming area, it is a port on the Yellow Sea and home to large electronics firms. Camp Humphreys, 3,510 acres (1,420 hectares), the site of the U.S. forces and UN Command headquarters since 2018 and one of the largest overseas U.S. military bases, is there. The area around the base resembles a small American city, with shopping malls, fast-food outlets, and street signs in English.