Total population78,133people
Households41,187households
Average age53.6yrs
Sex ratioMale39,314peopleFemale38,819people50.3%49.7%
Population change
Change over time
4-year trendUnit: people
76,651 in 202278,133 in 2026
Up 1.9% over the past 4 years.
Migration
As of August 2026Monthly Overview
Moved in469people
Moved out455people
Net migration14people
Net migration by month
Unit: people
Net inflowNet outflow
Top origins
Unit: people
| Region | Moved in |
|---|---|
| Hongseong-gun | 54 |
| Cheonan-si | 25 |
| Asan-si | 17 |
| Seosan-si | 14 |
| Dangjin-si | 12 |
Top destinations
Unit: people
| Region | Moved out |
|---|---|
| Hongseong-gun | 78 |
| Asan-si | 36 |
| Cheonan-si | 25 |
| Hwaseong-si, Gyeonggi | 10 |
| Dangjin-si | 10 |
Net migration varied across the past 12 months, totaling +59.
Population structure
Population by age
As of September 2026Population by age and sex
Unit: people
Male 39,314Female 38,819
Age structure
Unit: %
Youth 7.4%Working age 55.7%Seniors 36.8%
60s is the largest group, at 16,355 people.
Population ranking
Population by region
As of September 2026- YoungestSapgyo-eup43.8 yrs
- OldestDaesul-myeon64.2 yrs
| Region | Share | ||
|---|---|---|---|
| Yesan-eup | 28,824 | 36.9% | 51.6 yrs |
| Sapgyo-eup | 19,016 | 24.3% | 43.8 yrs |
| Deoksan-myeon | 5,939 | 7.6% | 59 yrs |
| Godeok-myeon | 3,901 | 5% | 61.7 yrs |
| Oga-myeon | 3,643 | 4.7% | 62.1 yrs |
| Sinam-myeon | 3,015 | 3.9% | 63.1 yrs |
| Sinyang-myeon | 2,799 | 3.6% | 62.5 yrs |
| Gwangsi-myeon | 2,749 | 3.5% | 63.3 yrs |
| Bongsan-myeon | 2,294 | 2.9% | 60.8 yrs |
| Eungbong-myeon | 2,165 | 2.8% | 60.8 yrs |
| Daesul-myeon | 2,160 | 2.8% | 64.2 yrs |
| Daeheung-myeon | 1,628 | 2.1% | 64 yrs |
The top three areas hold 68.8% of the population of Yesan-gun, Chungcheongnam-do.
Frequently asked questionsβ
Yesan-gun, Chungcheongnam-do has 78,133 residents as of September 2026., 783 fewer than a year earlier.
Yesan-eup, home to 28,824 residents (36.9% of Yesan-gun, Chungcheongnam-do).
It is 53.6 as of September 2026., 7.9 years above the national average of 45.7. Among its towns and townships, Sapgyo-eup is youngest at 43.8 and Daesul-myeon oldest at 64.2.
It rose 1.9% over 4 years, from 76,651 in 2022 to 78,133 in September 2026.
As of August 2026, the most people moved in from Hongseong-gun (54) and the most moved out to Hongseong-gun (78). Net migration varied across the past 12 months, totaling +59.
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