한국어

Population of Sujeong-gu, Seongnam-si

Resident registration data, June 2026 (MOIS)

Total population234,639people
Average age45.7yrs

Population structure

Population by age

10-year bands · by sex

Population by age and sex

Unit: people

Under 1010s20s30s40s👑 50s60s70s80s90s100+6,7388,11314,26719,53417,94419,56718,57510,1323,34931556,4337,97912,97516,92616,00618,51919,04911,9355,27897623

Male 118,540Female 116,099

Age structure

Unit: %

Youth 9.0%Working age 69.3%Seniors 21.7%9.0%69.3%21.7%

Youth 9.0%Working age 69.3%Seniors 21.7%

50s is the largest group, at 38,086 people.

Population change

Change over time

4-year trend

Unit: people

234,728 in 2022230,731 in 2023237,179 in 2024233,521 in 2025234,639 in 202620222023202420252026

234,728 in 2022234,639 in 2026

Barely changed over the past 4 years.

Population ranking

Sinheung-dong has the largest population of the 16 neighborhoods.

Population by region

16
  • YoungestSimgok-dong34.9 yrs
  • OldestSangjeok-dong51.6 yrs

There is a 16.7-year gap in average age between the youngest and the oldest area.

RegionPopulationShareAverage age
Sinheung-dong54,09623.1%45.5 yrs
Taepyeong-dong49,25921%49 yrs
Changgok-dong45,10419.2%41.9 yrs
Sujin-dong24,87810.6%50.8 yrs
Dandae-dong14,0906%47.5 yrs
Bokjeong-dong13,7535.9%38.9 yrs
Godeung-dong10,8484.6%40.9 yrs
Yangji-dong8,8663.8%48.8 yrs
Sanseong-dong4,3671.9%48.7 yrs
Simgok-dong3,0161.3%34.9 yrs
Siheung-dong1,8220.8%45.2 yrs
Sinchon-dong1,1380.5%40.8 yrs
Sasong-dong9470.4%46.2 yrs
Sangjeok-dong8400.4%51.6 yrs
Geumto-dong8370.4%42.8 yrs
Oya-dong7780.3%49.1 yrs

The top three areas hold 63.3% of the population of Sujeong-gu, Seongnam-si.

Other regions

Other districts in Gyeonggi

16

Frequently asked questions❓

Sujeong-gu, Seongnam-si has 234,639 residents as of June 2026., 1,118 more than a year earlier.
Sinheung-dong, home to 54,096 residents — 23.1% of Sujeong-gu, Seongnam-si.
It is 45.7 as of June 2026., close to the national average of 45.6. Among its neighborhoods, Simgok-dong is youngest at 34.9 and Sangjeok-dong oldest at 51.6.
It has held steady over the past 4 years, at 234,639 as of 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 🌐