Total population498,222people
Households223,466households
Average age44.3yrs
Sex ratioMale242,526peopleFemale255,696people48.7%51.3%
Population change
Change over time
4-year trendUnit: people
462,109 in 2022498,222 in 2026
Up 7.8% over the past 4 years.
Migration
As of August 2026Monthly Overview
Moved in5,087people
Moved out5,646people
Net migrationβ559people
Net migration by month
Unit: people
Net inflowNet outflow
Top origins
Unit: people
| Region | Moved in |
|---|---|
| Songpa-gu | 509 |
| Hanam-si, Gyeonggi | 224 |
| Namyangju-si, Gyeonggi | 147 |
| Gwangjin-gu | 144 |
| Seongnam-si, Gyeonggi | 121 |
Top destinations
Unit: people
| Region | Moved out |
|---|---|
| Songpa-gu | 439 |
| Hanam-si, Gyeonggi | 322 |
| Namyangju-si, Gyeonggi | 255 |
| Gwangjin-gu | 139 |
| Guri-si, Gyeonggi | 121 |
Net migration varied across the past 12 months, totaling β1,552.
Population structure
Population by age
As of September 2026Population by age and sex
Unit: people
Male 242,526Female 255,696
Age structure
Unit: %
Youth 10.7%Working age 69.2%Seniors 20.1%
40s is the largest group, at 81,166 people.
Population ranking
Population by region
As of September 2026- YoungestGodeok-dong40.7 yrs
- OldestCheonho-dong46.7 yrs
| Region | Share | ||
|---|---|---|---|
| Cheonho-dong | 87,544 | 17.6% | 46.7 yrs |
| Seongnae-dong | 64,136 | 12.9% | 45.9 yrs |
| Amsa-dong | 63,764 | 12.8% | 45.7 yrs |
| Dunchon-dong | 58,160 | 11.7% | 42.6 yrs |
| Sangil-dong | 52,065 | 10.5% | 41 yrs |
| Godeok-dong | 49,820 | 10% | 40.7 yrs |
| Gil-dong | 46,943 | 9.4% | 46.3 yrs |
| Myeongil-dong | 41,617 | 8.4% | 43.6 yrs |
| Gangil-dong | 34,173 | 6.9% | 43.8 yrs |
The top three areas hold 43.2% of the population of Gangdong-gu, Seoul.
Frequently asked questionsβ
Gangdong-gu, Seoul has 498,222 residents as of September 2026., 825 fewer than a year earlier.
Cheonho-dong, home to 87,544 residents (17.6% of Gangdong-gu, Seoul).
It is 44.3 as of September 2026., 1.4 years below the national average of 45.7. Among its neighborhoods, Godeok-dong is youngest at 40.7 and Cheonho-dong oldest at 46.7.
It rose 7.8% over 4 years, from 462,109 in 2022 to 498,222 in September 2026.
As of August 2026, the most people moved in from Songpa-gu (509) and the most moved out to Songpa-gu (439). Net migration varied across the past 12 months, totaling β1,552.
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
- Internal Migration Statistics, Statistics Korea (KOSIS)KOGL Type 1 Β· as of August 2026 Β· updated monthly