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Population of Osan-si, Gyeonggi

Resident registration data, June 2026 (MOIS)

Total population253,590people
Average age41.2yrs

Population structure

Population by age

10-year bands · by sex

Population by age and sex

Unit: people

Under 1010s20s30s👑 40s50s60s70s80s90s100+9,23913,99015,55122,99825,34221,89914,5746,3312,20123328,67013,41113,04918,18221,56120,08614,4497,3653,74668624

Male 132,360Female 121,230

Age structure

Unit: %

Youth 12.5%Working age 73.7%Seniors 13.8%12.5%73.7%13.8%

Youth 12.5%Working age 73.7%Seniors 13.8%

40s is the largest group, at 46,903 people.

Population change

Change over time

4-year trend

Unit: people

230,165 in 2022229,099 in 2023236,847 in 2024246,976 in 2025253,590 in 202620222023202420252026

230,165 in 2022253,590 in 2026

Up 10.2% over the past 4 years.

Population ranking

Won-dong has the largest population of the 24 neighborhoods.

Population by region

24
  • YoungestTap-dong37.2 yrs
  • OldestDugok-dong61.1 yrs

There is a 23.9-year gap in average age between the youngest and the oldest area.

RegionPopulationShareAverage age
Won-dong43,15817%41.5 yrs
Gwol-dong29,91411.8%38.8 yrs
Geumam-dong20,9098.2%41.9 yrs
Busan-dong19,1077.5%39.9 yrs
Osan-dong17,6957%46.9 yrs
Sucheong-dong15,9726.3%41.9 yrs
Galgot-dong13,0725.2%42.8 yrs
Naesammi-dong12,1744.8%39.1 yrs
Yangsan-dong9,4443.7%41.8 yrs
Segyo-dong9,0903.6%40.3 yrs
Nueup-dong8,6143.4%39.9 yrs
Oesammi-dong7,5753%39.4 yrs
Seo-dong7,4342.9%40.7 yrs
Cheongho-dong6,8722.7%42.3 yrs
Tap-dong6,5502.6%37.2 yrs
Gasu-dong6,2962.5%40.1 yrs
Jigot-dong5,5872.2%39.4 yrs
Gohyeon-dong4,9031.9%37.8 yrs
Eungye-dong4,3001.7%47.2 yrs
Cheonghak-dong3,2141.3%44.3 yrs
Beoreum-dong8520.3%37.3 yrs
Gajang-dong4710.2%51.4 yrs
Seorang-dong2020.1%57.8 yrs
Dugok-dong1850.1%61.1 yrs

The top three areas hold 37.1% of the population of Osan-si, Gyeonggi.

Other regions

Other districts in Gyeonggi

16

Frequently asked questions❓

Osan-si, Gyeonggi has 253,590 residents as of June 2026., 6,614 more than a year earlier.
Won-dong, home to 43,158 residents — 17.0% of Osan-si, Gyeonggi.
It is 41.2 as of June 2026., 4.4 years below the national average of 45.6. Among its neighborhoods, Tap-dong is youngest at 37.2 and Dugok-dong oldest at 61.1.
It rose 10.2% over 4 years, from 230,165 in 2022 to 253,590 in June 2026.
This is resident registration data from Korea's Ministry of the Interior and Safety. Figures are as of the end of June 2026 and are updated monthly. The data is open under KOGL Type 1.
Resident registration counts people at their registered address. The census counts them where they actually live. The gap is widest in university towns and industrial areas, where many people never change their registered address.

Sources 🌐