Osan Population 2026
Osan has a population of 238,788, making it the #41 biggest city in 🇰🇷 South Korea, located in Gyeonggi-do. Roughly 0.5% of South Korea's population lives here. It is about 43× smaller than Seoul, the country's biggest city.
Population (city proper)
238,788
Rank in South Korea
#41
Coordinates
37.15°N, 127.07°E
~22 m elevation · Asia/Seoul
Distance to capital (Seoul)
47 km
29 miles, straight line
Other big cities in Gyeonggi-do
| City | Population | Rank in South Korea |
|---|---|---|
| Suwon | 1,234,582 | #7 |
| Goyang-si | 1,061,752 | #9 |
| Seongnam-si | 914,832 | #11 |
| Bucheon-si | 850,731 | #13 |
| Hwaseong-si | 640,890 | #15 |
| Ansan-si | 623,256 | #17 |
| Anyang-si | 595,644 | #18 |
| Uijeongbu-si | 479,141 | #22 |
Cities near Osan
- Suwon1,234,582 people · ~16 km away
- Pyeongtaek364,694 people · ~18 km away
- Hwaseong-si640,890 people · ~23 km away
- Anseong69,255 people · ~24 km away
- Uiwang63,040 people · ~26 km away
- Gunpo286,485 people · ~26 km away
FAQ
What is the population of Osan?
Osan has a population of 238,788 (city proper, latest official figure via GeoNames), making it the #41 biggest city in South Korea.
What region is Osan in?
Osan is located in Gyeonggi-do, South Korea.
Is Osan the capital of South Korea?
No, the capital of South Korea is Seoul, about 47 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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