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Banpo Han River Park Sebitseom, Banpo-dong, Seocho-guSeoul Arts Center Opera House & Concert Hall, Seocho-dong, Seocho-guYangjaecheon Stream Bike Path, Yangjae-dong, Seocho-guJamwon Han River Park Bench Path, Jamwon-dong, Seocho-guUmyeonsan Valley Forest Trail & Bridge, Umyeon-dong, Seocho-guSeoul Skyline from Guryongsan Observatory, Yeomgok-dong, Seocho-guStreet at Woori Bank, Bangbae-ro, Bangbae-dong, Seocho-guHeoninneung Royal Tombs Lawn, Naegok-dong, Seocho-gu

Population of Seocho-gu, Seoul

As of September 2026

Total population416,928people
Households175,016households
Average age43.1yrs
Sex ratioMale197,836peopleFemale219,092people47.5%52.5%

Population change

Change over time

4-year trend

Unit: people

406,565 in 2022404,616 in 2023407,858 in 2024411,378 in 2025416,928 in 202620222023202420252026

406,565 in 2022416,928 in 2026

Up 2.5% over the past 4 years.

Migration

As of August 2026

Monthly Overview

Moved in7,282people
Moved out5,083people
Net migration2,199people

Net migration by month

Unit: people

1,070717342931916227βˆ’248βˆ’641βˆ’563βˆ’1721722,199SepOctNovDecJanFebMarAprMayJunJulAug1,070 in Sep 2025717 in Oct 2025342 in Nov 2025931 in Dec 2025916 in Jan 2026227 in Feb 2026βˆ’248 in Mar 2026βˆ’641 in Apr 2026βˆ’563 in May 2026βˆ’172 in Jun 2026172 in Jul 20262,199 in Aug 2026

Net inflowNet outflow

Top origins

Unit: people

RegionMoved in
Gangnam-gu732
Dongjak-gu446
Songpa-gu358
Gwanak-gu224
Yeongdeungpo-gu203

Top destinations

Unit: people

RegionMoved out
Gangnam-gu452
Dongjak-gu300
Gwanak-gu174
Yongin-si, Gyeonggi154
Songpa-gu137

Inflows exceeded outflows in 8 of the past 12 months, for a net gain of 4,950.

Want more detail on migration in Seocho-gu?See more Seocho-gu statistics on GData

Population structure

Population by age

As of September 2026

Population by age and sex

Unit: people

Under 1010s20s30sπŸ‘‘ 40s50s60s70s80s90s100+13,51723,04622,35926,72332,75533,94722,99715,1456,5667651612,70022,78025,03630,73638,42835,44325,94618,6087,8371,53245

Male 197,836Female 219,092

Age structure

Unit: %

Youth 11.8%Working age 70.2%Seniors 18.0%11.8%70.2%18.0%

Youth 11.8%Working age 70.2%Seniors 18.0%

40s is the largest group, at 71,183 people.

Population ranking

Population by region

As of September 2026
  • YoungestBanpo-dong41.2 yrs
  • OldestWonji-dong56.7 yrs
RegionShare
Seocho-dong105,93825.4%42.7 yrs
Bangbae-dong95,45022.9%44.4 yrs
Banpo-dong79,83819.1%41.2 yrs
Jamwon-dong58,07613.9%42 yrs
Yangjae-dong34,4668.3%44.6 yrs
Umyeon-dong26,3116.3%44.8 yrs
Naegok-dong7,8991.9%44.6 yrs
Sinwon-dong7,7451.9%45.7 yrs
Yeomgok-dong9560.2%49.7 yrs
Wonji-dong2490.1%56.7 yrs

The top three areas hold 67.5% of the population of Seocho-gu, Seoul.

Want to explore Seocho-gu's demographics in more detail?See more Seocho-gu statistics on GData

Frequently asked questions❓

Seocho-gu, Seoul has 416,928 residents as of September 2026., 5,550 more than a year earlier.
Seocho-dong, home to 105,938 residents (25.4% of Seocho-gu, Seoul).
It is 43.1 as of September 2026., 2.6 years below the national average of 45.7. Among its neighborhoods, Banpo-dong is youngest at 41.2 and Wonji-dong oldest at 56.7.
It rose 2.5% over 4 years, from 406,565 in 2022 to 416,928 in September 2026.
As of August 2026, the most people moved in from Gangnam-gu (732) and the most moved out to Gangnam-gu (452). Inflows exceeded outflows in 8 of the past 12 months, for a net gain of 4,950.
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 🌐