Total population178,532people
Households89,202households
Average age47.8yrs
Sex ratioMale89,897peopleFemale88,635people50.4%49.6%
Population change
Change over time
4-year trendUnit: people
184,957 in 2022178,532 in 2026
Down 3.5% over the past 4 years.
Migration
As of August 2026Monthly Overview
Moved in1,636people
Moved out1,588people
Net migration48people
Net migration by month
Unit: people
Net inflowNet outflow
Top origins
Unit: people
| Region | Moved in |
|---|---|
| Jeju-si | 207 |
| Gangnam-gu, Seoul | 37 |
| Hwaseong-si, Gyeonggi | 37 |
| Goyang-si, Gyeonggi | 29 |
| Seongnam-si, Gyeonggi | 26 |
Top destinations
Unit: people
| Region | Moved out |
|---|---|
| Jeju-si | 297 |
| Yongin-si, Gyeonggi | 24 |
| Pyeongtaek-si, Gyeonggi | 20 |
| Changwon-si, Gyeongsangnam-do | 20 |
| Yongsan-gu, Seoul | 18 |
Outflows exceeded inflows in 10 of the past 12 months, for a net loss of 838.
Population structure
Population by age
As of September 2026Population by age and sex
Unit: people
Male 89,897Female 88,635
Age structure
Unit: %
Youth 10.8%Working age 63.8%Seniors 25.4%
50s is the largest group, at 32,452 people.
Population ranking
Population by region
As of September 2026- YoungestGangjeong-dong42.5 yrs
- OldestSanghyo-dong57.8 yrs
| Region | Share | ||
|---|---|---|---|
| Donghong-dong | 22,413 | 12.6% | 44.6 yrs |
| Daejeong-eup | 21,571 | 12.1% | 46.8 yrs |
| Namwon-eup | 17,600 | 9.9% | 52.3 yrs |
| Seongsan-eup | 14,506 | 8.1% | 52.7 yrs |
| Pyoseon-myeon | 12,849 | 7.2% | 48.7 yrs |
| Gangjeong-dong | 12,444 | 7% | 42.5 yrs |
| Andeok-myeon | 12,237 | 6.9% | 48.9 yrs |
| Seohong-dong | 11,270 | 6.3% | 42.5 yrs |
| Seogwi-dong | 9,485 | 5.3% | 52.2 yrs |
| Jungmun-dong | 8,009 | 4.5% | 42.7 yrs |
| Seoho-dong | 7,127 | 4% | 43.5 yrs |
| Beophwan-dong | 4,880 | 2.7% | 47.5 yrs |
| Topyeong-dong | 3,859 | 2.2% | 50.2 yrs |
| Hahyo-dong | 2,751 | 1.5% | 52.4 yrs |
| Hogeun-dong | 2,750 | 1.5% | 46.7 yrs |
| Sinhyo-dong | 2,433 | 1.4% | 47.5 yrs |
| Daepo-dong | 2,153 | 1.2% | 48.9 yrs |
| Bomok-dong | 1,968 | 1.1% | 51.3 yrs |
| Sangye-dong | 1,347 | 0.8% | 53.7 yrs |
| Hawon-dong | 1,301 | 0.7% | 52.3 yrs |
| Saekdal-dong | 1,256 | 0.7% | 46 yrs |
| Sanghyo-dong | 1,220 | 0.7% | 57.8 yrs |
| Haye-dong | 1,131 | 0.6% | 54.2 yrs |
| Dosun-dong | 866 | 0.5% | 52.9 yrs |
| Hoesu-dong | 582 | 0.3% | 54.5 yrs |
| Wolpyeong-dong | 505 | 0.3% | 53 yrs |
| Yeongnam-dong | 19 | 0% | 56.7 yrs |
The top three areas hold 34.5% of the population of Seogwipo-si, Jeju-do.
Frequently asked questionsβ
Seogwipo-si, Jeju-do has 178,532 residents as of September 2026., 1,638 fewer than a year earlier.
Donghong-dong, home to 22,413 residents (12.6% of Seogwipo-si, Jeju-do).
It is 47.8 as of September 2026., 2.1 years above the national average of 45.7. Among its neighborhoods, Gangjeong-dong is youngest at 42.5 and Sanghyo-dong oldest at 57.8.
It fell 3.5% over 4 years, from 184,957 in 2022 to 178,532 in September 2026.
As of August 2026, the most people moved in from Jeju-si (207) and the most moved out to Jeju-si (297). Outflows exceeded inflows in 10 of the past 12 months, for a net loss of 838.
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