Total population277,509people
Households142,743households
Average age49.1yrs
Sex ratioMale133,228peopleFemale144,281people48.0%52.0%
Population change
Change over time
4-year trendUnit: people
296,073 in 2022277,509 in 2026
Down 6.3% over the past 4 years.
Migration
As of August 2026Monthly Overview
Moved in2,564people
Moved out2,663people
Net migrationβ99people
Net migration by month
Unit: people
Net inflowNet outflow
Top origins
Unit: people
| Region | Moved in |
|---|---|
| Dobong-gu | 255 |
| Seongbuk-gu | 252 |
| Nowon-gu | 118 |
| Uijeongbu-si, Gyeonggi | 76 |
| Dongdaemun-gu | 70 |
Top destinations
Unit: people
| Region | Moved out |
|---|---|
| Dobong-gu | 231 |
| Seongbuk-gu | 216 |
| Nowon-gu | 135 |
| Uijeongbu-si, Gyeonggi | 99 |
| Dongdaemun-gu | 64 |
Outflows exceeded inflows in 10 of the past 12 months, for a net loss of 1,581.
Population structure
Population by age
As of September 2026Population by age and sex
Unit: people
Male 133,228Female 144,281
Age structure
Unit: %
Youth 6.5%Working age 66.3%Seniors 27.2%
50s is the largest group, at 47,934 people.
Population ranking
Population by region
As of September 2026- YoungestMia-dong47.8 yrs
- OldestUi-dong51.3 yrs
| Region | Share | ||
|---|---|---|---|
| Mia-dong | 123,836 | 44.6% | 47.8 yrs |
| Suyu-dong | 97,963 | 35.3% | 49.8 yrs |
| Beon-dong | 45,264 | 16.3% | 50.8 yrs |
| Ui-dong | 10,446 | 3.8% | 51.3 yrs |
The top three areas hold 96.2% of the population of Gangbuk-gu, Seoul.
Frequently asked questionsβ
Gangbuk-gu, Seoul has 277,509 residents as of September 2026., 3,005 fewer than a year earlier.
Mia-dong, home to 123,836 residents (44.6% of Gangbuk-gu, Seoul).
It is 49.1 as of September 2026., 3.4 years above the national average of 45.7. Among its neighborhoods, Mia-dong is youngest at 47.8 and Ui-dong oldest at 51.3.
It fell 6.3% over 4 years, from 296,073 in 2022 to 277,509 in September 2026.
As of August 2026, the most people moved in from Dobong-gu (255) and the most moved out to Dobong-gu (231). Outflows exceeded inflows in 10 of the past 12 months, for a net loss of 1,581.
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