Total population515,337people
Households232,166households
Average age42.4yrs
Sex ratioMale268,168peopleFemale247,169people52.0%48.0%
Population change
Change over time
4-year trendUnit: people
513,331 in 2022515,337 in 2026
Barely changed over the past 4 years.
Migration
As of August 2026Monthly Overview
Moved in4,531people
Moved out4,299people
Net migration232people
Net migration by month
Unit: people
Net inflowNet outflow
Top origins
Unit: people
| Region | Moved in |
|---|---|
| Ansan-si | 347 |
| Bucheon-si | 290 |
| Gwangmyeong-si | 176 |
| Hwaseong-si | 105 |
| Anyang-si | 101 |
Top destinations
Unit: people
| Region | Moved out |
|---|---|
| Ansan-si | 271 |
| Bucheon-si | 149 |
| Hwaseong-si | 126 |
| Namdong-gu, Incheon | 111 |
| Anyang-si | 105 |
Net migration varied across the past 12 months, totaling β115.
Population structure
Population by age
As of September 2026Population by age and sex
Unit: people
Male 268,168Female 247,169
Age structure
Unit: %
Youth 12.2%Working age 72.4%Seniors 15.5%
50s is the largest group, at 92,283 people.
Population ranking
Population by region
As of September 2026- YoungestGunja-dong35.5 yrs
- OldestMurwang-dong63.6 yrs
| Region | Share | ||
|---|---|---|---|
| Jeongwang-dong | 111,602 | 21.7% | 43.2 yrs |
| Baegot-dong | 70,624 | 13.7% | 36.7 yrs |
| Eunhaeng-dong | 57,105 | 11.1% | 40.5 yrs |
| Daeya-dong | 41,687 | 8.1% | 44.9 yrs |
| Janggok-dong | 32,919 | 6.4% | 38.8 yrs |
| Sincheon-dong | 31,989 | 6.2% | 48.8 yrs |
| Jonam-dong | 23,954 | 4.6% | 42.3 yrs |
| Janghyeon-dong | 22,288 | 4.3% | 37.3 yrs |
| Geomo-dong | 20,693 | 4% | 46.7 yrs |
| Neunggok-dong | 19,573 | 3.8% | 43.6 yrs |
| Wolgot-dong | 17,582 | 3.4% | 45 yrs |
| Sanhyeon-dong | 8,743 | 1.7% | 38.4 yrs |
| Hajung-dong | 7,734 | 1.5% | 47 yrs |
| Maehwa-dong | 7,692 | 1.5% | 48.3 yrs |
| Hasang-dong | 7,013 | 1.4% | 46.5 yrs |
| Gunja-dong | 5,338 | 1% | 35.5 yrs |
| Po-dong | 5,179 | 1% | 50.3 yrs |
| Jugyul-dong | 5,018 | 1% | 42 yrs |
| Nongok-dong | 3,959 | 0.8% | 47 yrs |
| Mokgam-dong | 3,723 | 0.7% | 44.2 yrs |
| Misan-dong | 3,113 | 0.6% | 51.8 yrs |
| Dochang-dong | 2,914 | 0.6% | 50.4 yrs |
| Gwangseok-dong | 1,475 | 0.3% | 39.6 yrs |
| Gwarim-dong | 1,206 | 0.2% | 57.7 yrs |
| Gyesu-dong | 500 | 0.1% | 60 yrs |
| Mujinae-dong | 481 | 0.1% | 58.8 yrs |
| Bangsan-dong | 409 | 0.1% | 61.9 yrs |
| Anhyeon-dong | 347 | 0.1% | 58.6 yrs |
| Geumi-dong | 239 | 0% | 60.9 yrs |
| Murwang-dong | 188 | 0% | 63.6 yrs |
| Hwajeong-dong | 50 | 0% | 54.3 yrs |
The top three areas hold 46.4% of the population of Siheung-si, Gyeonggi.
Frequently asked questionsβ
Siheung-si, Gyeonggi has 515,337 residents as of September 2026., 1,063 more than a year earlier.
Jeongwang-dong, home to 111,602 residents (21.7% of Siheung-si, Gyeonggi).
It is 42.4 as of September 2026., 3.3 years below the national average of 45.7. Among its neighborhoods, Gunja-dong is youngest at 35.5 and Murwang-dong oldest at 63.6.
It rose 0.4% over 4 years, from 513,331 in 2022 to 515,337 in September 2026.
As of August 2026, the most people moved in from Ansan-si (347) and the most moved out to Ansan-si (271). Net migration varied across the past 12 months, totaling β115.
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 π
- Resident registration data, Ministry of the Interior and SafetyKOGL Type 1 Β· as of September 2026 Β· updated monthly
- Internal Migration Statistics, Statistics Korea (KOSIS)KOGL Type 1 Β· as of August 2026 Β· updated monthly