Total population365,299people
Households172,134households
Average age42yrs
Sex ratioMale190,549peopleFemale174,750people52.2%47.8%
Population change
Change over time
4-year trendUnit: people
331,806 in 2022365,299 in 2026
Up 10.1% over the past 4 years.
Migration
As of August 2026Monthly Overview
Moved in4,253people
Moved out3,284people
Net migration969people
Net migration by month
Unit: people
Net inflowNet outflow
Top origins
Unit: people
| Region | Moved in |
|---|---|
| Cheonan-si | 875 |
| Pyeongtaek-si, Gyeonggi | 147 |
| Cheongju-si, Chungcheongbuk-do | 81 |
| Dangjin-si | 81 |
| Suwon-si, Gyeonggi | 79 |
Top destinations
Unit: people
| Region | Moved out |
|---|---|
| Cheonan-si | 459 |
| Pyeongtaek-si, Gyeonggi | 132 |
| Hwaseong-si, Gyeonggi | 55 |
| Suwon-si, Gyeonggi | 46 |
| Cheongju-si, Chungcheongbuk-do | 46 |
Inflows exceeded outflows in every one of the past 12 months, for a net gain of 6,491.
Population structure
Population by age
As of September 2026Population by age and sex
Unit: people
Male 190,549Female 174,750
Age structure
Unit: %
Youth 13.4%Working age 70.0%Seniors 16.5%
40s is the largest group, at 65,179 people.
Population ranking
Population by region
As of September 2026- YoungestTangjeong-myeon33.6 yrs
- OldestEumnae-dong63.7 yrs
| Region | Share | ||
|---|---|---|---|
| Baebang-eup | 99,072 | 27.1% | 38.2 yrs |
| Tangjeong-myeon | 47,327 | 13% | 33.6 yrs |
| Mojong-dong | 27,791 | 7.6% | 40.2 yrs |
| Dunpo-myeon | 23,635 | 6.5% | 42.5 yrs |
| Eumbong-myeon | 22,923 | 6.3% | 41.5 yrs |
| Sinchang-myeon | 22,579 | 6.2% | 46.1 yrs |
| Yonghwa-dong | 20,213 | 5.5% | 42.8 yrs |
| Oncheon-dong | 18,782 | 5.1% | 47.9 yrs |
| Punggi-dong | 14,278 | 3.9% | 39.8 yrs |
| Gwongok-dong | 13,707 | 3.8% | 43.3 yrs |
| Bangchuk-dong | 6,802 | 1.9% | 47.6 yrs |
| Yeomchi-eup | 5,570 | 1.5% | 55.5 yrs |
| Inju-myeon | 5,245 | 1.4% | 56.4 yrs |
| Yeongin-myeon | 5,059 | 1.4% | 58.9 yrs |
| Sirok-dong | 4,314 | 1.2% | 46.4 yrs |
| Dogo-myeon | 4,125 | 1.1% | 60.5 yrs |
| Songak-myeon | 3,880 | 1.1% | 56.2 yrs |
| Jwabu-dong | 3,667 | 1% | 50.3 yrs |
| Jangjon-dong | 3,090 | 0.8% | 51.6 yrs |
| Seonjang-myeon | 2,703 | 0.7% | 63.4 yrs |
| Beopgok-dong | 2,330 | 0.6% | 43.9 yrs |
| Baemi-dong | 2,157 | 0.6% | 48.6 yrs |
| Deuksan-dong | 1,712 | 0.5% | 47.9 yrs |
| Eumnae-dong | 1,571 | 0.4% | 63.7 yrs |
| Sinin-dong | 1,290 | 0.4% | 48.1 yrs |
| Chosa-dong | 534 | 0.1% | 53.2 yrs |
| Sin-dong | 299 | 0.1% | 57.5 yrs |
| Nam-dong | 298 | 0.1% | 48.2 yrs |
| Gisan-dong | 252 | 0.1% | 60.8 yrs |
| Jeomyang-dong | 94 | 0% | 58.6 yrs |
The top three areas hold 47.7% of the population of Asan-si, Chungcheongnam-do.
Frequently asked questionsβ
Asan-si, Chungcheongnam-do has 365,299 residents as of September 2026., 7,187 more than a year earlier.
Baebang-eup, home to 99,072 residents (27.1% of Asan-si, Chungcheongnam-do).
It is 42 as of September 2026., 3.7 years below the national average of 45.7. Among its neighborhoods, Tangjeong-myeon is youngest at 33.6 and Eumnae-dong oldest at 63.7.
It rose 10.1% over 4 years, from 331,806 in 2022 to 365,299 in September 2026.
As of August 2026, the most people moved in from Cheonan-si (875) and the most moved out to Cheonan-si (459). Inflows exceeded outflows in every one of the past 12 months, for a net gain of 6,491.
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