Ali DealsAliExpress Dealsν•œκ΅­μ–΄
Buldang Lake Park, Buldang-dong, Seobuk-gu

Population of Seobuk-gu, Cheonan-si

As of September 2026

Total population402,712people
Households192,688households
Average age40.9yrs
Sex ratioMale208,228peopleFemale194,484people51.7%48.3%

Population change

Change over time

4-year trend

Unit: people

401,615 in 2022400,248 in 2023397,967 in 2024401,424 in 2025402,712 in 202620222023202420252026

401,615 in 2022402,712 in 2026

Barely changed over the past 4 years.

Population structure

Population by age

As of September 2026

Population by age and sex

Unit: people

Under 1010s20s30sπŸ‘‘ 40s50s60s70s80s90s100+14,45422,04727,75935,53037,41633,42724,1999,7753,231387313,63821,01423,97929,77232,72232,24723,09211,0235,6711,30322

Male 208,228Female 194,484

Age structure

Unit: %

Youth 12.3%Working age 74.0%Seniors 13.7%12.3%74.0%13.7%

Youth 12.3%Working age 74.0%Seniors 13.7%

40s is the largest group, at 70,138 people.

Population ranking

Population by region

As of September 2026
  • YoungestSeongseong-dong32.2 yrs
  • OldestIpjang-myeon55.8 yrs
RegionShare
Dujeong-dong73,67118.3%38.7 yrs
Buldang-dong68,76117.1%35.9 yrs
Ssangyong-dong62,55215.5%44.3 yrs
Baekseok-dong40,28410%38.3 yrs
Seongjeong-dong36,8299.1%45 yrs
Seongseong-dong26,3536.5%32.2 yrs
Seonghwan-eup21,3645.3%51.8 yrs
Seonggeo-eup21,2655.3%46.1 yrs
Jiksan-eup18,9334.7%46.8 yrs
Chaam-dong12,5023.1%33 yrs

The top three areas hold 50.9% of the population of Seobuk-gu, Cheonan-si.

Frequently asked questions❓

Seobuk-gu, Cheonan-si has 402,712 residents as of September 2026., 1,288 more than a year earlier.
Dujeong-dong, home to 73,671 residents (18.3% of Seobuk-gu, Cheonan-si).
It is 40.9 as of September 2026., 4.8 years below the national average of 45.7. Among its neighborhoods, Seongseong-dong is youngest at 32.2 and Ipjang-myeon oldest at 55.8.
It rose 0.3% over 4 years, from 401,615 in 2022 to 402,712 in September 2026.
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 🌐