Seoul (pop. 10,612,600), or Kyongsong, capital, largest city, and industrial and cultural center of South Korea, on the Han River, 25 mi (40 km) east of Inchon, its seaport. It was founded in 1392 as capital of the Yi dynasty, and remained so until 1910. Seoul changed hands several times in the Korean War and suffered great damage. Largely built, it has grown rapidly. The 1988 Summer Olympic Games were held in Seoul.
See also: Korea.