Gyeonggi-do · South Korea
Osan population
238,788people · latest figure
Osan has a population of 238,788, making it the 41st largest place we list in South Korea. It is in Gyeonggi-do.
Osan holds 0.46% of South Korea's 51,600,388 people. Seoul, the largest place we list there, is 43 times its size. Twenty years earlier the World Gazetteer recorded 158,978, a rise of 50%.
The 2005 figure comes from the World Gazetteer archive restored on this site. The two sources may draw the settlement's boundary differently, so treat the change as indicative rather than exact. Why figures differ.
Nearby in size
| Place | Region | Population |
|---|---|---|
| Gunsan | Jeollabuk-do | 264,656 |
| Hanam | Gyeonggi-do | 254,415 |
| Gyeongju | Gyeongsangbuk-do | 245,365 |
| Geoje | Gyeongsangnam-do | 232,921 |
| Chungju | North Chungcheong | 209,483 |
| Gangneung | Gangwon-do | 208,161 |
Figures are the latest available in GeoNames (CC BY 4.0), which draws on national censuses of varying dates — treat them as recent, not same-year. Country totals are UN World Population Prospects 2024 (medium variant) where the UN lists the country separately; the handful it reports under a parent state keep a GeoNames figure and are marked as such. Sources & method.