The Seoul metropolitan area (Sudogwon; Korean: 수도권, [sʰu.do.k͈wʌ̹n]) or Gyeonggi region (경기 지방), is the metropolitan area of Seoul, Incheon, and Gyeonggi Province, located in north-western South Korea. Its population of 26 million (as of 2024) is ranked as the fourth-largest metropolitan area in the world. Its area is about 12,685 km (4,898 sq mi). It forms the cultural, commercial, financial, industrial, and residential center of South Korea. The largest city is Seoul, with a population of approximately 10 million people, followed by Incheon, with three million inhabitants.