Seosan Population 2026
Seosan has a population of 74,208, making it the #78 biggest city in 🇰🇷 South Korea, located in Chungcheongnam-do. Roughly 0.1% of South Korea's population lives here. It is about 139× smaller than Seoul, the country's biggest city.
Population (city proper)
74,208
Rank in South Korea
#78
Coordinates
36.78°N, 126.45°E
~33 m elevation · Asia/Seoul
Distance to capital (Seoul)
99 km
61 miles, straight line
Other big cities in Chungcheongnam-do
Cities near Seosan
FAQ
What is the population of Seosan?
Seosan has a population of 74,208 (city proper, latest official figure via GeoNames), making it the #78 biggest city in South Korea.
What region is Seosan in?
Seosan is located in Chungcheongnam-do, South Korea.
Is Seosan the capital of South Korea?
No, the capital of South Korea is Seoul, about 99 km away.
Sources & notes
Population refers to the city proper (municipal boundaries), not the metropolitan area. Source: GeoNames (CC BY 4.0), retrieved 2026-07-07. Country data: UN World Population Prospects 2024.
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