Seoul is the capital and largest city of the Republic of Korea.
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It forms the only city of special subordination in the country, divided into 25 self-governing districts.
Population - 10.1 million people (2015), or 19.5% of the country's population. Forms the Seoul-Incheon metropolitan area with a population of 23.5 million (2015), the fourth largest in the world. Located in the northwest of the Republic of Korea near the Yellow Sea, on a plain surrounded by mountains, on the banks of the Hangang River, 24 km from the border with the DPRK.