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World Measure
The population almanac240 countries · 31,365 cities · UN WPP 2024
City profile · South Korea · Asia

Seongnam-si

Gyeonggi-do · South Korea
City population
914,832
#11
in South Korea
#3
in Gyeonggi-do
#601
worldwide
SeoulSeongnam-si
37.439, 127.138 · 20 km from Seoul
City population
914,832
Within the city boundary, not a metro area
Rank in South Korea
#11
of 144 cities of 15,000+
World rank
#601
of 31,365 cities listed
Share of South Korea
1.8%
of the national population

About Seongnam-si

The third city of Gyeonggi-do by population, Seongnam-si holds 914,832 residents and accounts for 1.8% of South Korea's total. It lies 20 km from Seoul. Nearby cities include Hanam at 13 km with 254,415 people, Gunpo 19 km away with 286,485 residents, and Guri-si at 18 km with 195,236 inhabitants.

This summary is AI-generated from the figures on this page. The figures themselves come from the sources cited beside each value.

Position in South Korea
#11of 144
LargestSmallest
Position in Gyeonggi-do
#3of 28
LargestSmallest

Key Facts

Country
South Korea
Region
Gyeonggi-do
Rank in region
#3of 28
Distance to capital
20 km
to Seoul
Elevation
80 m
Approximate — modelled, not surveyed
Time zone
Asia/Seoul
Coordinates
37.439, 127.138
Record updated
2025-04-01
Entry edited, not measured

City population, GeoNames. GeoNames publishes no year for its population figures, so “record updated” is when the entry was last edited — not the date the population was measured. Elevation is modelled from a digital elevation model rather than surveyed, so it is approximate.

Nearby Cities

All 144 in South Korea

Closest listed cities by great-circle distance from the city centre.

11KMGwangju82K people13KMHanam254K people18KMGuri-si195K people18KMWabu97K people19KMGunpo286K people

Compared with the World's Largest Cities

City-proper population against the fifteen largest cities in the dataset.

  1. Shanghai24.9M
  2. Beijing19M
  3. Shenzhen17.5M
  4. Guangzhou16.1M
  5. Kinshasa16M
  6. Istanbul15.7M
  7. Lagos15.4M
  8. Ho Chi Minh City14M
  9. Chengdu13.6M
  10. Lahore13M
  11. Mumbai12.7M
  12. São Paulo12.4M
  13. Mexico City12.3M
  14. Karachi11.6M
  15. Tianjin11.1M
  16. Seongnam-si915K
City-proper figures only. Administrative boundaries differ between countries, so these are not directly comparable to metropolitan-area estimates.
Seongnam-si compared with the fifteen largest cities
NameCity population
Shanghai24.9M
Beijing19M
Shenzhen17.5M
Guangzhou16.1M
Kinshasa16M
Istanbul15.7M
Lagos15.4M
Ho Chi Minh City14M
Chengdu13.6M
Lahore13M
Mumbai12.7M
São Paulo12.4M
Mexico City12.3M
Karachi11.6M
Tianjin11.1M
Seongnam-si915K

Seongnam-si Population FAQ

What is the population of Seongnam-si?

Seongnam-si has a city population of 914,832. That is the population within the city's own boundary, not its wider metropolitan area. City population, GeoNames.

Where is Seongnam-si?

Seongnam-si is in Gyeonggi-do, South Korea, 20 km from the capital, Seoul. Its coordinates are 37.439, 127.138.

How big is Seongnam-si compared with other cities in South Korea?

It is the 11th largest of the 144 cities of 15,000 or more listed in South Korea, holding 1.8% of the national population.

Explore

South KoreaAll 144 citiesGyeonggi-do28 cities in the regionCountry profileSouth Korea population & indicators