Total population100,964people
Households53,370households
Average age50.6yrs
Sex ratioMale48,251peopleFemale52,713people47.8%52.2%
Population change
Change over time
4-year trendUnit: people
105,386 in 2022100,964 in 2026
Down 4.2% over the past 4 years.
Migration
As of August 2026Monthly Overview
Moved in784people
Moved out785people
Net migrationβ1people
Net migration by month
Unit: people
Net inflowNet outflow
Top origins
Unit: people
| Region | Moved in |
|---|---|
| Saha-gu | 72 |
| Jung-gu | 62 |
| Yeongdo-gu | 28 |
| Busanjin-gu | 28 |
| Nam-gu | 28 |
Top destinations
Unit: people
| Region | Moved out |
|---|---|
| Saha-gu | 83 |
| Gangseo-gu | 36 |
| Busanjin-gu | 33 |
| Haeundae-gu | 33 |
| Jung-gu | 29 |
Outflows exceeded inflows in 10 of the past 12 months, for a net loss of 748.
Population structure
Population by age
As of September 2026Population by age and sex
Unit: people
Male 48,251Female 52,713
Age structure
Unit: %
Youth 7.3%Working age 61.3%Seniors 31.4%
60s is the largest group, at 18,718 people.
Population ranking
Population by region
As of September 2026- YoungestBumindong2-ga37.2 yrs
- OldestChojang-dong59 yrs
| Region | Share | ||
|---|---|---|---|
| Amnam-dong | 17,514 | 17.3% | 48.6 yrs |
| Seodaesindong3-ga | 13,907 | 13.8% | 48.1 yrs |
| Nambumin-dong | 11,218 | 11.1% | 57.9 yrs |
| Seodaesindong2-ga | 9,008 | 8.9% | 47 yrs |
| Dongdaesindong3-ga | 6,914 | 6.8% | 49.7 yrs |
| Dongdaesindong2-ga | 6,102 | 6% | 55.3 yrs |
| Amidong2-ga | 5,719 | 5.7% | 56.1 yrs |
| Seodaesindong1-ga | 5,423 | 5.4% | 45 yrs |
| Dongdaesindong1-ga | 4,979 | 4.9% | 50.6 yrs |
| Chojang-dong | 3,431 | 3.4% | 59 yrs |
| Bumindong3-ga | 2,957 | 2.9% | 48.2 yrs |
| Toseongdong1-ga | 2,629 | 2.6% | 47.6 yrs |
| Toseongdong5-ga | 1,813 | 1.8% | 50.9 yrs |
| Buyongdong1-ga | 1,628 | 1.6% | 43.4 yrs |
| Chungmudong1-ga | 1,355 | 1.3% | 55.5 yrs |
| Bumindong1-ga | 1,270 | 1.3% | 42.2 yrs |
| Buyongdong2-ga | 1,127 | 1.1% | 48.5 yrs |
| Chungmudong2-ga | 1,058 | 1% | 57.5 yrs |
| Toseongdong2-ga | 927 | 0.9% | 48.1 yrs |
| Chungmudong3-ga | 588 | 0.6% | 57.2 yrs |
| Toseongdong3-ga | 552 | 0.5% | 50.2 yrs |
| Toseongdong4-ga | 301 | 0.3% | 51.3 yrs |
| Bumindong2-ga | 300 | 0.3% | 37.2 yrs |
| Amidong1-ga | 244 | 0.2% | 52.6 yrs |
The top three areas hold 42.2% of the population of Seo-gu, Busan.
Frequently asked questionsβ
Seo-gu, Busan has 100,964 residents as of September 2026., 1,526 fewer than a year earlier.
Amnam-dong, home to 17,514 residents (17.3% of Seo-gu, Busan).
It is 50.6 as of September 2026., 4.9 years above the national average of 45.7. Among its neighborhoods, Bumindong2-ga is youngest at 37.2 and Chojang-dong oldest at 59.
It fell 4.2% over 4 years, from 105,386 in 2022 to 100,964 in September 2026.
As of August 2026, the most people moved in from Saha-gu (72) and the most moved out to Saha-gu (83). Outflows exceeded inflows in 10 of the past 12 months, for a net loss of 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