ATLAS · MEGA-CITIES · SOUTH KOREA
Seoul
Seoul is the one mega-city of South Korea — the only urban area in the country to pass five million people. The largest, Seoul, holds an estimated 9,796,000people across its urban agglomeration — a large mega-city. From Natural Earth, snapshot 2026-06-24.
MEGA-CITYSeoul
POPULATION~9,796,000
NUMBER OF MEGA-CITIES1
The mega-city
Seoul~9,796,000 people
In context
Where Seoulsits on the world’s scale of mega-cities — from the cities just over five million to the singular supergiant above twenty.
20M+
15–20M
10–15M
7–10MSeoul is here
5–7M
Mega-cities of other countries
Japan · United States · Mexico · India · Brazil · China · Bangladesh · Argentina