Total population32,628people
Households19,610households
Average age59yrs
Sex ratioMale16,301peopleFemale16,327people50.0%50.0%
Population change
Change over time
4-year trendUnit: people
34,144 in 202232,628 in 2026
Down 4.4% over the past 4 years.
Migration
As of August 2026Monthly Overview
Moved in233people
Moved out207people
Net migration26people
Net migration by month
Unit: people
Net inflowNet outflow
Top origins
Unit: people
| Region | Moved in |
|---|---|
| Jinju-si | 62 |
| Changwon-si | 9 |
| Sacheon-si | 6 |
| Gimhae-si | 6 |
| Suyeong-gu, Busan | 4 |
Top destinations
Unit: people
| Region | Moved out |
|---|---|
| Jinju-si | 52 |
| Changwon-si | 12 |
| Gimhae-si | 9 |
| Hamyang-gun | 6 |
| Jeonju-si, Jeonbuk-do | 5 |
Net migration varied across the past 12 months, totaling +159.
Population structure
Population by age
As of September 2026Population by age and sex
Unit: people
Male 16,301Female 16,327
Age structure
Unit: %
Youth 4.7%Working age 49.8%Seniors 45.4%
60s is the largest group, at 8,414 people.
Population ranking
Population by region
As of September 2026- YoungestSancheong-eup53.2 yrs
- OldestObu-myeon64.7 yrs
| Region | Share | ||
|---|---|---|---|
| Sancheong-eup | 6,426 | 19.7% | 53.2 yrs |
| Danseong-myeon | 5,438 | 16.7% | 61 yrs |
| Sinan-myeon | 5,389 | 16.5% | 54.5 yrs |
| Sicheon-myeon | 3,839 | 11.8% | 59.9 yrs |
| Geumseo-myeon | 2,806 | 8.6% | 60.4 yrs |
| Sindeung-myeon | 1,882 | 5.8% | 63.7 yrs |
| Saengcho-myeon | 1,790 | 5.5% | 64.2 yrs |
| Samjang-myeon | 1,723 | 5.3% | 63.2 yrs |
| Chahwang-myeon | 1,302 | 4% | 64.2 yrs |
| Saengbiryang-myeon | 1,090 | 3.3% | 63.9 yrs |
| Obu-myeon | 943 | 2.9% | 64.7 yrs |
The top three areas hold 52.9% of the population of Sancheong-gun, Gyeongsangnam-do.
Frequently asked questionsβ
Sancheong-gun, Gyeongsangnam-do has 32,628 residents as of September 2026., 364 fewer than a year earlier.
Sancheong-eup, home to 6,426 residents (19.7% of Sancheong-gun, Gyeongsangnam-do).
It is 59 as of September 2026., 13.3 years above the national average of 45.7. Among its towns and townships, Sancheong-eup is youngest at 53.2 and Obu-myeon oldest at 64.7.
It fell 4.4% over 4 years, from 34,144 in 2022 to 32,628 in September 2026.
As of August 2026, the most people moved in from Jinju-si (62) and the most moved out to Jinju-si (52). Net migration varied across the past 12 months, totaling +159.
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