Total population234,948people
Households117,650households
Average age45.7yrs
Sex ratioMale118,665peopleFemale116,283people50.5%49.5%
Population change
Change over time
4-year trendUnit: people
234,303 in 2022234,948 in 2026
Barely changed over the past 4 years.
Population structure
Population by age
As of September 2026Population by age and sex
Unit: people
Male 118,665Female 116,283
Age structure
Unit: %
Youth 9.1%Working age 69.2%Seniors 21.8%
50s is the largest group, at 38,054 people.
Population ranking
Population by region
As of September 2026- YoungestSimgok-dong34.8 yrs
- OldestSangjeok-dong51.7 yrs
| Region | Share | ||
|---|---|---|---|
| Sinheung-dong | 54,098 | 23% | 45.6 yrs |
| Taepyeong-dong | 49,202 | 20.9% | 49.1 yrs |
| Changgok-dong | 45,037 | 19.2% | 42 yrs |
| Sujin-dong | 24,697 | 10.5% | 51 yrs |
| Dandae-dong | 14,065 | 6% | 47.6 yrs |
| Bokjeong-dong | 13,955 | 5.9% | 38.8 yrs |
| Godeung-dong | 10,866 | 4.6% | 41 yrs |
| Yangji-dong | 8,860 | 3.8% | 48.9 yrs |
| Sanseong-dong | 4,358 | 1.9% | 48.8 yrs |
| Simgok-dong | 3,002 | 1.3% | 34.8 yrs |
| Siheung-dong | 1,816 | 0.8% | 45.4 yrs |
| Sinchon-dong | 1,565 | 0.7% | 38.3 yrs |
| Sasong-dong | 957 | 0.4% | 46 yrs |
| Geumto-dong | 859 | 0.4% | 42.7 yrs |
| Sangjeok-dong | 838 | 0.4% | 51.7 yrs |
| Oya-dong | 773 | 0.3% | 49.3 yrs |
The top three areas hold 63.1% of the population of Sujeong-gu, Seongnam-si.
Frequently asked questionsβ
Sujeong-gu, Seongnam-si has 234,948 residents as of September 2026., 2,115 more than a year earlier.
Sinheung-dong, home to 54,098 residents (23.0% of Sujeong-gu, Seongnam-si).
It is 45.7 as of September 2026., close to the national average of 45.7. Among its neighborhoods, Simgok-dong is youngest at 34.8 and Sangjeok-dong oldest at 51.7.
It rose 0.3% over 4 years, from 234,303 in 2022 to 234,948 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