Cheonan Population 2026
Cheonan has a population of 658,831, making it the #14 biggest city in 🇰🇷 South Korea, located in Chungcheongnam-do. Roughly 1.3% of South Korea's population lives here. It is about 16× smaller than Seoul, the country's biggest city.
Population (city proper)
658,831
Rank in South Korea
#14
Coordinates
36.81°N, 127.15°E
~40 m elevation · Asia/Seoul
Distance to capital (Seoul)
86 km
53 miles, straight line
Other big cities in Chungcheongnam-do
Cities near Cheonan
FAQ
What is the population of Cheonan?
Cheonan has a population of 658,831 (city proper, latest official figure via GeoNames), making it the #14 biggest city in South Korea.
What region is Cheonan in?
Cheonan is located in Chungcheongnam-do, South Korea.
Is Cheonan the capital of South Korea?
No, the capital of South Korea is Seoul, about 86 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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