Total population255,303people
Households118,916households
Average age41.3yrs
Sex ratioMale133,324peopleFemale121,979people52.2%47.8%
Population change
Change over time
4-year trendUnit: people
230,142 in 2022255,303 in 2026
Up 10.9% over the past 4 years.
Migration
As of August 2026Monthly Overview
Moved in2,843people
Moved out2,368people
Net migration475people
Net migration by month
Unit: people
Net inflowNet outflow
Top origins
Unit: people
| Region | Moved in |
|---|---|
| Hwaseong-si | 536 |
| Suwon-si | 270 |
| Pyeongtaek-si | 148 |
| Yongin-si | 102 |
| Anseong-si | 40 |
Top destinations
Unit: people
| Region | Moved out |
|---|---|
| Hwaseong-si | 426 |
| Pyeongtaek-si | 186 |
| Suwon-si | 167 |
| Yongin-si | 52 |
| Seongnam-si | 41 |
Inflows exceeded outflows in every one of the past 12 months, for a net gain of 7,259.
Population structure
Population by age
As of September 2026Population by age and sex
Unit: people
Male 133,324Female 121,979
Age structure
Unit: %
Youth 12.4%Working age 73.7%Seniors 13.9%
40s is the largest group, at 47,078 people.
Population ranking
Population by region
As of September 2026- YoungestBeoreum-dong36.1 yrs
- OldestDugok-dong60.8 yrs
| Region | Share | ||
|---|---|---|---|
| Won-dong | 43,224 | 16.9% | 41.6 yrs |
| Gwol-dong | 30,407 | 11.9% | 38.9 yrs |
| Geumam-dong | 20,869 | 8.2% | 42 yrs |
| Busan-dong | 19,068 | 7.5% | 40 yrs |
| Osan-dong | 17,669 | 6.9% | 47.1 yrs |
| Sucheong-dong | 15,923 | 6.2% | 41.9 yrs |
| Galgot-dong | 13,037 | 5.1% | 43 yrs |
| Naesammi-dong | 12,170 | 4.8% | 39.2 yrs |
| Yangsan-dong | 9,421 | 3.7% | 41.9 yrs |
| Segyo-dong | 9,047 | 3.5% | 40.4 yrs |
| Nueup-dong | 8,577 | 3.4% | 40 yrs |
| Oesammi-dong | 7,605 | 3% | 39.5 yrs |
| Seo-dong | 7,447 | 2.9% | 40.9 yrs |
| Cheongho-dong | 6,929 | 2.7% | 42.4 yrs |
| Tap-dong | 6,592 | 2.6% | 37.2 yrs |
| Gasu-dong | 6,346 | 2.5% | 40.2 yrs |
| Jigot-dong | 5,587 | 2.2% | 39.6 yrs |
| Gohyeon-dong | 4,939 | 1.9% | 37.9 yrs |
| Eungye-dong | 4,289 | 1.7% | 47.4 yrs |
| Cheonghak-dong | 3,271 | 1.3% | 44.1 yrs |
| Beoreum-dong | 2,035 | 0.8% | 36.1 yrs |
| Gajang-dong | 469 | 0.2% | 52 yrs |
| Seorang-dong | 199 | 0.1% | 58.1 yrs |
| Dugok-dong | 183 | 0.1% | 60.8 yrs |
The top three areas hold 37.0% of the population of Osan-si, Gyeonggi.
Frequently asked questionsβ
Osan-si, Gyeonggi has 255,303 residents as of September 2026., 8,098 more than a year earlier.
Won-dong, home to 43,224 residents (16.9% of Osan-si, Gyeonggi).
It is 41.3 as of September 2026., 4.4 years below the national average of 45.7. Among its neighborhoods, Beoreum-dong is youngest at 36.1 and Dugok-dong oldest at 60.8.
It rose 10.9% over 4 years, from 230,142 in 2022 to 255,303 in September 2026.
As of August 2026, the most people moved in from Hwaseong-si (536) and the most moved out to Hwaseong-si (426). Inflows exceeded outflows in every one of the past 12 months, for a net gain of 7,259.
This is resident registration data from Korea's Ministry of the Interior and Safety. Figures are as of the end of September 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 π
- Resident registration data, Ministry of the Interior and SafetyKOGL Type 1 Β· as of September 2026 Β· updated monthly
- Internal Migration Statistics, Statistics Korea (KOSIS)KOGL Type 1 Β· as of August 2026 Β· updated monthly