Total population464,238people
Households225,454households
Average age43.3yrs
Sex ratioMale227,315peopleFemale236,923people49.0%51.0%
Population change
Change over time
4-year trendUnit: people
471,029 in 2022464,238 in 2026
Down 1.4% over the past 4 years.
Migration
As of August 2026Monthly Overview
Moved in5,149people
Moved out5,428people
Net migrationβ279people
Net migration by month
Unit: people
Net inflowNet outflow
Top origins
Unit: people
| Region | Moved in |
|---|---|
| Yuseong-gu | 626 |
| Jung-gu | 420 |
| Dong-gu | 261 |
| Daedeok-gu | 157 |
| Cheongju-si, Chungcheongbuk-do | 97 |
Top destinations
Unit: people
| Region | Moved out |
|---|---|
| Yuseong-gu | 1,229 |
| Jung-gu | 362 |
| Dong-gu | 218 |
| Daedeok-gu | 123 |
| Cheonan-si, Chungcheongnam-do | 81 |
Net migration varied across the past 12 months, totaling +748.
Population structure
Population by age
As of September 2026Population by age and sex
Unit: people
Male 227,315Female 236,923
Age structure
Unit: %
Youth 10.7%Working age 71.0%Seniors 18.3%
50s is the largest group, at 76,689 people.
Population ranking
Population by region
As of September 2026- YoungestDoan-dong36.1 yrs
- OldestHeukseok-dong64 yrs
| Region | Share | ||
|---|---|---|---|
| Dunsan-dong | 68,790 | 14.8% | 42 yrs |
| Gwanjeo-dong | 61,007 | 13.1% | 40.9 yrs |
| Wolpyeong-dong | 43,654 | 9.4% | 45.7 yrs |
| Galma-dong | 43,569 | 9.4% | 43.2 yrs |
| Doma-dong | 38,233 | 8.2% | 46.8 yrs |
| Doan-dong | 36,352 | 7.8% | 36.1 yrs |
| Tanbang-dong | 31,205 | 6.7% | 40.7 yrs |
| Nae-dong | 21,311 | 4.6% | 46.4 yrs |
| Boksu-dong | 20,157 | 4.3% | 43.4 yrs |
| Yongmun-dong | 19,257 | 4.1% | 42.3 yrs |
| Goejeong-dong | 18,084 | 3.9% | 41.7 yrs |
| Jeongnim-dong | 15,396 | 3.3% | 49.6 yrs |
| Byeon-dong | 12,045 | 2.6% | 49.9 yrs |
| Mannyeon-dong | 11,847 | 2.6% | 41.9 yrs |
| Gajang-dong | 10,216 | 2.2% | 47.9 yrs |
| Gasuwon-dong | 9,649 | 2.1% | 49.6 yrs |
| Heukseok-dong | 613 | 0.1% | 64 yrs |
| Jangan-dong | 512 | 0.1% | 52 yrs |
| Pyeongchon-dong | 420 | 0.1% | 59.7 yrs |
| Goegok-dong | 300 | 0.1% | 61.7 yrs |
| Sanjik-dong | 299 | 0.1% | 62.2 yrs |
| O-dong | 295 | 0.1% | 59.7 yrs |
| Wonjeong-dong | 291 | 0.1% | 60.6 yrs |
| Maeno-dong | 253 | 0.1% | 61.3 yrs |
| Bonggok-dong | 174 | 0% | 62.7 yrs |
| Umyeong-dong | 165 | 0% | 58.9 yrs |
| Yongchon-dong | 144 | 0% | 63.8 yrs |
The top three areas hold 37.4% of the population of Seo-gu, Daejeon.
Frequently asked questionsβ
Seo-gu, Daejeon has 464,238 residents as of September 2026., 995 more than a year earlier.
Dunsan-dong, home to 68,790 residents (14.8% of Seo-gu, Daejeon).
It is 43.3 as of September 2026., 2.4 years below the national average of 45.7. Among its neighborhoods, Doan-dong is youngest at 36.1 and Heukseok-dong oldest at 64.
It fell 1.4% over 4 years, from 471,029 in 2022 to 464,238 in September 2026.
As of August 2026, the most people moved in from Yuseong-gu (626) and the most moved out to Yuseong-gu (1,229). Net migration varied across the past 12 months, totaling +748.
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