Incheon, officially the Incheon Metropolitan City (인천광역시), is a city located in northwestern South Korea, bordering Seoul and Gyeonggi to the east. Inhabited since the Neolithic, Incheon was home to just 4,700 people when it became an international port in 1883. Today, about 3 million people live in the city, making it South Korea's third most-populous city after Seoul and Busan.
