Foreign residents21,189peopleNaturalized citizens 3,672 people
Foreign resident share3.17%Of registered residents
Resident types
Seo-gu ranks 3rd of 10 in Incheon by foreign residents.
By residence type
As of September 2026Unit: %
Overseas Koreans 17.4%Other foreign nationals 33.6%Migrant workers 34.2%Marriage migrants 13.5%Foreign students 1.2%
| Type | People | Share |
|---|---|---|
| Overseas Koreans | 3,691 | 17.4% |
| Other foreign nationals | 7,121 | 33.6% |
| Migrant workers | 7,257 | 34.2% |
| Marriage migrants | 2,860 | 13.5% |
| Foreign students | 260 | 1.2% |
Migrant workers are the largest group at 7,257.
Age structure
By age group
As of September 2026| Age group | People | Share |
|---|---|---|
| Under 10 | 780 | 3.7% |
| 10s | 564 | 2.7% |
| 20s | 4,140 | 19.5% |
| 30s | 7,184 | 33.9% |
| 40s | 3,913 | 18.5% |
| 50s | 2,537 | 12% |
| 60s | 1,498 | 7.1% |
| 70+ | 573 | 2.7% |
Residents in their 30s are the largest age group at 7,184.
Frequently asked questionsβ
21,189 as of the 2026 survey, or 3.17% of its population.
Migrant workers form the largest group, at 7,257.
3rd out of 10.
The 2026 edition of the annual local foreign resident survey by Korea's Ministry of the Interior and Safety. Population figures come from monthly resident registration data, so the two have different reference dates.
Sources π
- MOIS Survey of Foreign Residents by Local GovernmentKOGL Type 1 Β· 2026 survey Β· updated yearly