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Population of Ansan-si, Gyeonggi

Resident registration data, June 2026 (MOIS)

Total population609,240people
Average age44.9yrs

Population structure

Population by age

10-year bands · by sex

Population by age and sex

Unit: people

Under 1010s20s30s40s👑 50s60s70s80s90s100+14,53826,48142,25846,10843,79459,44753,08319,2146,2687832913,99825,24037,25236,94839,69759,51949,25121,15311,3612,71995

Male 312,005Female 297,235

Age structure

Unit: %

Youth 8.9%Working age 72.6%Seniors 18.5%8.9%72.6%18.5%

Youth 8.9%Working age 72.6%Seniors 18.5%

50s is the largest group, at 118,966 people.

Population change

Change over time

4-year trend

Unit: people

648,849 in 2022636,054 in 2023625,274 in 2024615,689 in 2025609,240 in 202620222023202420252026

648,849 in 2022609,240 in 2026

Down 6.1% over the past 4 years.

Population ranking

Sangnok-gu has the largest population of the 2 districts.

Population by region

2
RegionPopulationShareAverage age
Sangnok-gu320,77352.7%45.3 yrs
Danwon-gu288,46747.3%44.4 yrs

The top three areas hold 100.0% of the population of Ansan-si, Gyeonggi.

Other regions

Other districts in Gyeonggi

16

Frequently asked questions❓

Ansan-si, Gyeonggi has 609,240 residents as of June 2026., 6,449 fewer than a year earlier.
Sangnok-gu, home to 320,773 residents — 52.7% of Ansan-si, Gyeonggi.
It is 44.9 as of June 2026., 0.7 years below the national average of 45.6. Among its districts, Danwon-gu is youngest at 44.4 and Sangnok-gu oldest at 45.3.
It fell 6.1% over 4 years, from 648,849 in 2022 to 609,240 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 🌐