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Population of Dongjak-gu, Seoul

Resident registration data, June 2026 (MOIS)

Total population371,999people
Average age44.7yrs

Population structure

Population by age

10-year bands · by sex

Population by age and sex

Unit: people

Under 1010s20s👑 30s40s50s60s70s80s90s100+8,86012,77028,01531,79125,41627,43123,18814,6236,635744118,33512,17331,02530,43325,09728,93126,52119,0069,2581,69737

Male 179,484Female 192,515

Age structure

Unit: %

Youth 8.0%Working age 71.4%Seniors 20.7%71.4%20.7%

Youth 8.0%Working age 71.4%Seniors 20.7%

30s is the largest group, at 62,224 people.

Population change

Change over time

4-year trend

Unit: people

385,898 in 2022380,622 in 2023378,324 in 2024374,777 in 2025371,999 in 202620222023202420252026

385,898 in 2022371,999 in 2026

Down 3.6% over the past 4 years.

Population ranking

Sangdo-dong has the largest population of the 9 neighborhoods.

Population by region

9
  • YoungestSangdo1-dong39.1 yrs
  • OldestBon-dong46.5 yrs

There is a 7.4-year gap in average age between the youngest and the oldest area.

RegionPopulationShareAverage age
Sangdo-dong112,85430.3%45.1 yrs
Sadang-dong94,66225.4%45.7 yrs
Sindaebang-dong44,78612%43.9 yrs
Daebang-dong33,4669%43.7 yrs
Noryangjin-dong30,8428.3%44.1 yrs
Heukseok-dong29,8448%44.1 yrs
Bon-dong10,3022.8%46.5 yrs
Sangdo1-dong9,8082.6%39.1 yrs
Dongjak-dong5,4351.5%45.7 yrs

The top three areas hold 67.8% of the population of Dongjak-gu, Seoul.

Other regions

Other districts in Seoul

16

Frequently asked questions❓

Dongjak-gu, Seoul has 371,999 residents as of June 2026., 2,778 fewer than a year earlier.
Sangdo-dong, home to 112,854 residents — 30.3% of Dongjak-gu, Seoul.
It is 44.7 as of June 2026., 0.9 years below the national average of 45.6. Among its neighborhoods, Sangdo1-dong is youngest at 39.1 and Bon-dong oldest at 46.5.
It fell 3.6% over 4 years, from 385,898 in 2022 to 371,999 in June 2026.
This is resident registration data from Korea's Ministry of the Interior and Safety. Figures are as of the end of June 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 🌐