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.

It forms the cultural, commercial, financial, industrial, and residential center of South Korea.

[7] In 2023, the Seoul Metropolitan Area's gross regional domestic product was US$ 1.0 trillion, generating around half of the country's total GDP.

[2] It is the fourth-largest urban economy in the world after Tokyo, New York and Los Angeles but ahead of Paris and London.

Newer areas with more modern and luxurious apartments and infrastructure are more expensive, along with proximity to Gangnam District, the commercial center of the region.

[citation needed] Development in the area is currently governed by the Capital Region Readjustment Planning Act (수도권정비계획법), first passed in 1982 and last revised in 1996.

Below are seven of the largest cities, sorted by their population size: The four gu of Suwon (수원; 水原).