Total population662,681people
Households317,767households
Average age45.2yrs
Sex ratioMale331,063peopleFemale331,618people50.0%50.0%
Population change
Change over time
4-year trendUnit: people
679,016 in 2022662,681 in 2026
Down 2.4% over the past 4 years.
Migration
As of August 2026Monthly Overview
Moved in5,607people
Moved out5,510people
Net migration97people
Net migration by month
Unit: people
Net inflowNet outflow
Top origins
Unit: people
| Region | Moved in |
|---|---|
| Gyeonggi | 678 |
| Seoul | 659 |
| Busan | 187 |
| Incheon | 151 |
| Gyeongsangnam-do | 116 |
Top destinations
Unit: people
| Region | Moved out |
|---|---|
| Seoul | 666 |
| Gyeonggi | 588 |
| Busan | 152 |
| Incheon | 127 |
| Gyeongsangnam-do | 115 |
Outflows exceeded inflows in 10 of the past 12 months, for a net loss of 2,192.
Population structure
Population by age
As of September 2026Population by age and sex
Unit: people
Male 331,063Female 331,618
Age structure
Unit: %
Youth 11.7%Working age 67.1%Seniors 21.2%
50s is the largest group, at 118,208 people.
Population ranking
Population by region
As of September 2026| Region | Share | ||
|---|---|---|---|
| Jeju-si | 484,149 | 73.1% | 44.2 yrs |
| Seogwipo-si | 178,532 | 26.9% | 47.8 yrs |
Jeju-si alone holds 73.1% of the population of Jeju-do.
Frequently asked questionsβ
Jeju-do has 662,681 residents as of September 2026., 3,272 fewer than a year earlier.
Jeju-si, home to 484,149 residents (73.1% of Jeju-do).
It is 45.2 as of September 2026., 0.5 years below the national average of 45.7. Among its cities, Jeju-si is youngest at 44.2 and Seogwipo-si oldest at 47.8.
It fell 2.4% over 4 years, from 679,016 in 2022 to 662,681 in September 2026.
As of August 2026, the most people moved in from Gyeonggi (678) and the most moved out to Seoul (666). Outflows exceeded inflows in 10 of the past 12 months, for a net loss of 2,192.
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