Total population31,603people
Households18,119households
Average age55.3yrs
Sex ratioMale15,577peopleFemale16,026people49.3%50.7%
Population change
Change over time
4-year trendUnit: people
33,314 in 202231,603 in 2026
Down 5.1% over the past 4 years.
Migration
As of August 2026Monthly Overview
Moved in170people
Moved out189people
Net migrationβ19people
Net migration by month
Unit: people
Net inflowNet outflow
Top origins
Unit: people
| Region | Moved in |
|---|---|
| Buk-gu, Gwangju | 11 |
| Nam-gu, Gwangju | 9 |
| Gwangsan-gu, Gwangju | 9 |
| Dong-gu, Gwangju | 6 |
| Jangheung-gun | 6 |
Top destinations
Unit: people
| Region | Moved out |
|---|---|
| Buk-gu, Gwangju | 15 |
| Seo-gu, Gwangju | 13 |
| Nam-gu, Gwangju | 9 |
| Gwangsan-gu, Gwangju | 9 |
| Yeosu-si | 7 |
Net migration varied across the past 12 months, totaling +205.
Population structure
Population by age
As of September 2026Population by age and sex
Unit: people
Male 15,577Female 16,026
Age structure
Unit: %
Youth 7.5%Working age 51.9%Seniors 40.5%
60s is the largest group, at 6,869 people.
Population ranking
Population by region
As of September 2026- YoungestGangjin-eup49.4 yrs
- OldestDoam-myeon62.9 yrs
| Region | Share | ||
|---|---|---|---|
| Gangjin-eup | 12,344 | 39.1% | 49.4 yrs |
| Gundong-myeon | 4,734 | 15% | 51.5 yrs |
| Seongjeon-myeon | 2,530 | 8% | 60.7 yrs |
| Doam-myeon | 2,247 | 7.1% | 62.9 yrs |
| Chillyang-myeon | 1,983 | 6.3% | 61.7 yrs |
| Jakcheon-myeon | 1,629 | 5.2% | 62.3 yrs |
| Maryang-myeon | 1,586 | 5% | 59.5 yrs |
| Sinjeon-myeon | 1,580 | 5% | 61.8 yrs |
| Byeongyeong-myeon | 1,416 | 4.5% | 61.2 yrs |
| Daegu-myeon | 990 | 3.1% | 62.6 yrs |
| Omcheon-myeon | 564 | 1.8% | 61.9 yrs |
The top three areas hold 62.0% of the population of Gangjin-gun, Jeollanam-do.
Frequently asked questionsβ
Gangjin-gun, Jeollanam-do has 31,603 residents as of September 2026., 164 fewer than a year earlier.
Gangjin-eup, home to 12,344 residents (39.1% of Gangjin-gun, Jeollanam-do).
It is 55.3 as of September 2026., 9.6 years above the national average of 45.7. Among its towns and townships, Gangjin-eup is youngest at 49.4 and Doam-myeon oldest at 62.9.
It fell 5.1% over 4 years, from 33,314 in 2022 to 31,603 in September 2026.
As of August 2026, the most people moved in from Buk-gu, Gwangju (11) and the most moved out to Buk-gu, Gwangju (15). Net migration varied across the past 12 months, totaling +205.
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