Total population19,275people
Households12,190households
Average age54.2yrs
Sex ratioMale11,010peopleFemale8,265people57.1%42.9%
Population change
Change over time
4-year trendUnit: people
20,620 in 202219,275 in 2026
Down 6.5% over the past 4 years.
Migration
As of August 2026Monthly Overview
Moved in186people
Moved out223people
Net migrationβ37people
Net migration by month
Unit: people
Net inflowNet outflow
Top origins
Unit: people
| Region | Moved in |
|---|---|
| Michuhol-gu | 15 |
| Gwangmyeong-si, Gyeonggi | 10 |
| Pohang-si, Gyeongsangbuk-do | 9 |
| Namdong-gu | 7 |
| Yeonsu-gu | 7 |
Top destinations
Unit: people
| Region | Moved out |
|---|---|
| Yeonsu-gu | 16 |
| Pohang-si, Gyeongsangbuk-do | 16 |
| Michuhol-gu | 12 |
| Gimpo-si, Gyeonggi | 11 |
| Bupyeong-gu | 10 |
Outflows exceeded inflows in 9 of the past 12 months, for a net loss of 235.
Population structure
Population by age
As of September 2026Population by age and sex
Unit: people
Male 11,010Female 8,265
Age structure
Unit: %
Youth 4.7%Working age 58.2%Seniors 37.1%
60s is the largest group, at 4,691 people.
Population ranking
Population by region
As of September 2026- YoungestYeonpyeong-myeon48 yrs
- OldestDeokjeok-myeon61.4 yrs
| Region | Share | ||
|---|---|---|---|
| Yeongheung-myeon | 6,421 | 33.3% | 54.1 yrs |
| Baengnyeong-myeon | 4,428 | 23% | 48.8 yrs |
| Bukdo-myeon | 2,085 | 10.8% | 60.7 yrs |
| Yeonpyeong-myeon | 1,877 | 9.7% | 48 yrs |
| Deokjeok-myeon | 1,827 | 9.5% | 61.4 yrs |
| Daecheong-myeon | 1,345 | 7% | 55 yrs |
| Jawol-myeon | 1,292 | 6.7% | 60.8 yrs |
The top three areas hold 67.1% of the population of Ongjin-gun, Incheon.
Frequently asked questionsβ
Ongjin-gun, Incheon has 19,275 residents as of September 2026., 423 fewer than a year earlier.
Yeongheung-myeon, home to 6,421 residents (33.3% of Ongjin-gun, Incheon).
It is 54.2 as of September 2026., 8.5 years above the national average of 45.7. Among its towns and townships, Yeonpyeong-myeon is youngest at 48 and Deokjeok-myeon oldest at 61.4.
It fell 6.5% over 4 years, from 20,620 in 2022 to 19,275 in September 2026.
As of August 2026, the most people moved in from Michuhol-gu (15) and the most moved out to Yeonsu-gu (16). Outflows exceeded inflows in 9 of the past 12 months, for a net loss of 235.
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