Population of Gangseo-gu, Seoul
Resident registration data, June 2026 (MOIS)
Total population548,515people
Average age45.1yrs
Population structure
Population by age
10-year bands · by sexPopulation by age and sex
Unit: people
Male 261,729Female 286,786
Age structure
Unit: %
Youth 8.4%Working age 70.7%Seniors 20.9%
30s is the largest group, at 96,634 people.
Population change
Change over time
4-year trendUnit: people
573,045 in 2022548,515 in 2026
Down 4.3% over the past 4 years.
Population ranking
Hwagok-dong has the largest population of the 12 neighborhoods.
Population by region
12- YoungestMagok-dong39.7 yrs
- OldestOgok-dong61.9 yrs
There is a 22.2-year gap in average age between the youngest and the oldest area.
| Region | Population | Share | Average age |
|---|---|---|---|
| Hwagok-dong | 210,670 | 38.4% | 45.7 yrs |
| Deungchon-dong | 72,649 | 13.2% | 45.7 yrs |
| Magok-dong | 61,218 | 11.2% | 39.7 yrs |
| Banghwa-dong | 58,638 | 10.7% | 48.5 yrs |
| Naebalsan-dong | 44,271 | 8.1% | 43 yrs |
| Yeomchang-dong | 40,925 | 7.5% | 40.7 yrs |
| Gayang-dong | 40,899 | 7.5% | 49.3 yrs |
| Gonghang-dong | 16,743 | 3.1% | 46.6 yrs |
| Gaehwa-dong | 1,519 | 0.3% | 54 yrs |
| Oebalsan-dong | 955 | 0.2% | 47.1 yrs |
| Osoe-dong | 21 | 0% | 39.8 yrs |
| Ogok-dong | 7 | 0% | 61.9 yrs |
The top three areas hold 62.8% of the population of Gangseo-gu, Seoul.
Other regions
Other districts in Seoul
16Frequently asked questions❓
Gangseo-gu, Seoul has 548,515 residents as of June 2026., 3,384 fewer than a year earlier.
Hwagok-dong, home to 210,670 residents — 38.4% of Gangseo-gu, Seoul.
It is 45.1 as of June 2026., 0.5 years below the national average of 45.6. Among its neighborhoods, Magok-dong is youngest at 39.7 and Ogok-dong oldest at 61.9.
It fell 4.3% over 4 years, from 573,045 in 2022 to 548,515 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