Total population263,872people
Households129,748households
Average age44.9yrs
Sex ratioMale133,707peopleFemale130,165people50.7%49.3%
Population change
Change over time
4-year trendUnit: people
255,997 in 2022263,872 in 2026
Up 3.1% over the past 4 years.
Population structure
Population by age
As of September 2026Population by age and sex
Unit: people
Male 133,707Female 130,165
Age structure
Unit: %
Youth 10.1%Working age 69.6%Seniors 20.3%
50s is the largest group, at 46,160 people.
Population ranking
Population by region
As of September 2026- YoungestCheongdang-dong37.9 yrs
- OldestDong-myeon63.8 yrs
| Region | Share | ||
|---|---|---|---|
| Cheongdang-dong | 38,197 | 14.5% | 37.9 yrs |
| Sinbang-dong | 36,514 | 13.8% | 42 yrs |
| Sinbu-dong | 30,130 | 11.4% | 41.9 yrs |
| Mokcheon-eup | 21,688 | 8.2% | 49.4 yrs |
| Yonggok-dong | 19,014 | 7.2% | 40.4 yrs |
| Bongmyeong-dong | 15,619 | 5.9% | 45.6 yrs |
| Wonseong-dong | 13,855 | 5.3% | 52.9 yrs |
| Daga-dong | 11,380 | 4.3% | 47.6 yrs |
| Pungse-myeon | 10,604 | 4% | 45.3 yrs |
| Guseong-dong | 9,388 | 3.6% | 48.3 yrs |
| Cheongsu-dong | 9,180 | 3.5% | 46.2 yrs |
| Anseo-dong | 9,028 | 3.4% | 40.7 yrs |
| Munhwa-dong | 6,616 | 2.5% | 39.9 yrs |
| Byeongcheon-myeon | 5,870 | 2.2% | 53.5 yrs |
| Buk-myeon | 3,984 | 1.5% | 58.3 yrs |
| Gwangdeok-myeon | 3,942 | 1.5% | 60 yrs |
| Samnyong-dong | 2,734 | 1% | 39.2 yrs |
| Seongnam-myeon | 2,718 | 1% | 60 yrs |
| Yeongseong-dong | 2,228 | 0.8% | 52.4 yrs |
| Yuryang-dong | 2,042 | 0.8% | 50.3 yrs |
| Susin-myeon | 1,981 | 0.8% | 60.2 yrs |
| Dong-myeon | 1,870 | 0.7% | 63.8 yrs |
| Ssangyong-dong | 1,457 | 0.6% | 47.3 yrs |
| Seonghwang-dong | 1,272 | 0.5% | 53.3 yrs |
| Sajik-dong | 1,073 | 0.4% | 57.9 yrs |
| Daeheung-dong | 595 | 0.2% | 58.8 yrs |
| Guryong-dong | 448 | 0.2% | 57.4 yrs |
| Oryong-dong | 445 | 0.2% | 56.1 yrs |
The top three areas hold 39.7% of the population of Dongnam-gu, Cheonan-si.
Frequently asked questionsβ
Dongnam-gu, Cheonan-si has 263,872 residents as of September 2026., 2,337 more than a year earlier.
Cheongdang-dong, home to 38,197 residents (14.5% of Dongnam-gu, Cheonan-si).
It is 44.9 as of September 2026., 0.8 years below the national average of 45.7. Among its neighborhoods, Cheongdang-dong is youngest at 37.9 and Dong-myeon oldest at 63.8.
It rose 3.1% over 4 years, from 255,997 in 2022 to 263,872 in September 2026.
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