Population of Seongnam-si, Gyeonggi
Resident registration data, June 2026 (MOIS)
Total population902,344people
Average age44.4yrs
Population structure
Population by age
10-year bands · by sexPopulation by age and sex
Unit: people
Male 445,426Female 456,918
Age structure
Unit: %
Youth 10.4%Working age 70.0%Seniors 19.6%
50s is the largest group, at 149,609 people.
Population change
Change over time
4-year trendUnit: people
926,645 in 2022902,344 in 2026
Down 2.6% over the past 4 years.
Population ranking
Bundang-gu has the largest population of the 3 districts.
Population by region
3| Region | Population | Share | Average age |
|---|---|---|---|
| Bundang-gu | 467,641 | 51.8% | 42.9 yrs |
| Sujeong-gu | 234,639 | 26% | 45.7 yrs |
| Jungwon-gu | 200,064 | 22.2% | 46.4 yrs |
The top three areas hold 100.0% of the population of Seongnam-si, Gyeonggi.
Other regions
Other districts in Gyeonggi
16Frequently asked questions❓
Seongnam-si, Gyeonggi has 902,344 residents as of June 2026., 6,866 fewer than a year earlier.
Bundang-gu, home to 467,641 residents — 51.8% of Seongnam-si, Gyeonggi.
It is 44.4 as of June 2026., 1.2 years below the national average of 45.6. Among its districts, Bundang-gu is youngest at 42.9 and Jungwon-gu oldest at 46.4.
It fell 2.6% over 4 years, from 926,645 in 2022 to 902,344 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 🌐
- Resident registration data, Ministry of the Interior and SafetyKOGL Type 1 · as of June 2026 · updated monthly