Total population244,872people
Households109,796households
Average age43.2yrs
Sex ratioMale124,890peopleFemale119,982people51.0%49.0%
Population change
Change over time
4-year trendUnit: people
249,447 in 2022244,872 in 2026
Down 1.8% over the past 4 years.
Population structure
Population by age
As of September 2026Population by age and sex
Unit: people
Male 124,890Female 119,982
Age structure
Unit: %
Youth 11.2%Working age 72.5%Seniors 16.3%
50s is the largest group, at 45,311 people.
Population ranking
Population by region
As of September 2026- YoungestGwihyeon-dong28.3 yrs
- OldestTowol-dong73.1 yrs
| Region | Share | ||
|---|---|---|---|
| Sangnam-dong | 31,314 | 12.8% | 42.9 yrs |
| Ballim-dong | 25,890 | 10.6% | 41.5 yrs |
| Daebang-dong | 21,830 | 8.9% | 43.9 yrs |
| Namyang-dong | 20,621 | 8.4% | 45.9 yrs |
| Sapa-dong | 18,020 | 7.4% | 46.7 yrs |
| Daewon-dong | 16,881 | 6.9% | 39.5 yrs |
| Gaeum-dong | 16,030 | 6.5% | 39 yrs |
| Jungang-dong | 15,696 | 6.4% | 40.1 yrs |
| Yongho-dong | 14,472 | 5.9% | 41.4 yrs |
| Seongju-dong | 13,253 | 5.4% | 41.9 yrs |
| Banji-dong | 11,665 | 4.8% | 49.4 yrs |
| Sinwol-dong | 9,884 | 4% | 48.2 yrs |
| Anmin-dong | 8,868 | 3.6% | 41.9 yrs |
| Sinchon-dong | 5,735 | 2.3% | 48.9 yrs |
| Namsan-dong | 3,262 | 1.3% | 42.1 yrs |
| Nae-dong | 3,138 | 1.3% | 46.6 yrs |
| Sapajeong-dong | 2,612 | 1.1% | 35.3 yrs |
| Oe-dong | 2,328 | 1% | 43.4 yrs |
| Gaeumjeong-dong | 1,483 | 0.6% | 41.1 yrs |
| Cheonseon-dong | 906 | 0.4% | 48.1 yrs |
| Gwihyeon-dong | 288 | 0.1% | 28.3 yrs |
| Gwisan-dong | 283 | 0.1% | 61.7 yrs |
| Yanggok-dong | 150 | 0.1% | 63.4 yrs |
| Bulmosan-dong | 120 | 0% | 58.4 yrs |
| Gwigok-dong | 56 | 0% | 59.9 yrs |
| Bansong-dong | 15 | 0% | 67.5 yrs |
| Ungnam-dong | 14 | 0% | 51.6 yrs |
| Seongsan-dong | 14 | 0% | 46.5 yrs |
| Towol-dong | 12 | 0% | 73.1 yrs |
| Namji-dong | 9 | 0% | 54.6 yrs |
| Sangbok-dong | 7 | 0% | 68.7 yrs |
| Dudae-dong | 5 | 0% | 35.4 yrs |
| Toechon-dong | 5 | 0% | 72 yrs |
| Changgok-dong | 3 | 0% | 64.7 yrs |
| Samjeongja-dong | 1 | 0% | 43 yrs |
| Wanam-dong | 1 | 0% | 68 yrs |
| Jeokhyeon-dong | 1 | 0% | 69 yrs |
The top three areas hold 32.3% of the population of Seongsan-gu, Changwon-si.
Frequently asked questionsβ
Seongsan-gu, Changwon-si has 244,872 residents as of September 2026., 599 more than a year earlier.
Sangnam-dong, home to 31,314 residents (12.8% of Seongsan-gu, Changwon-si).
It is 43.2 as of September 2026., 2.5 years below the national average of 45.7. Among its neighborhoods, Gwihyeon-dong is youngest at 28.3 and Towol-dong oldest at 73.1.
It fell 1.8% over 4 years, from 249,447 in 2022 to 244,872 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