Seoul () is the biggest city of the Republic of Korea (South Korea), and its capital. Its official name is Seoul Special City ( "Seoul Teukbyeolsi"). It has a population of 10 million which is about 1/5 of the Korean population and 1/7 of Korea peninsula, and covers an area of 610 km² that is only 0.6% of South Korea. It is the 6th most populated city in the world, and 7th most crowded. Seoul is the center of politics, economy, culture, transportation, and education for South Korea.