Quick facts
Sejong overview
Sejong (orange) and the other large cities of South Korea
Sejong lies in Sejong-si in South Korea at 36.59°N, 127.29°E, about 49 m above sea level. The local time zone is Asia/Seoul (UTC+9); GeoNames classifies it as a regional capital.
It is smaller than Gumi (404,691) and larger than Pyeongtaek (364,694). The largest city in South Korea is Seoul with 10,349,312 people; the capital, Seoul, has 10,349,312.
The national capital, Seoul, is about 112 km away; the nearest large city is Cheongju-si, 18 km from Sejong.
South Korea as a whole has a live population of 51,579,911 (-0.1% a year) and ranks #31 of 238 countries — see the South Korea population page for the full statistics and the South Korea atlas for provinces, terrain and society maps.
Cities near Sejong
| City | Distance | Population |
|---|---|---|
| Cheongju-si North Chungcheong | 18 km | 852,147 |
| Cheonan Chungcheongnam-do | 27 km | 658,831 |
| Daejeon Daejeon | 28 km | 1,441,203 |
| Pyeongtaek Gyeonggi-do | 48 km | 364,694 |
| Osan Gyeonggi-do | 65 km | 238,788 |
| Chungju North Chungcheong | 71 km | 209,483 |
| Icheon-si Gyeonggi-do | 78 km | 196,230 |
| Iksan Jeollabuk-do | 78 km | 307,000 |
Largest cities in South Korea
Frequently asked questions
What is the population of Sejong?
Sejong has about 394,630 inhabitants according to the latest official census or estimate compiled by GeoNames. This is the city proper; the metropolitan area is larger.
Is Sejong the capital of South Korea?
No. The capital of South Korea is Seoul (10,349,312 people), about 112 km away. Sejong is the 25th largest city of the country and a regional capital.
How big is Sejong compared with the rest of South Korea?
Its 394,630 residents are 0.8% of the 51,579,911 people living in South Korea today. Seoul is larger with 10,349,312 people.
Where is Sejong?
In Sejong-si, South Korea, at latitude 36.59 and longitude 127.29, 49 m above sea level. Nearby large cities include Cheongju-si (18 km), Cheonan (27 km), Daejeon (28 km).
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Cite or link to this page
Glostats. (2026). Sejong Population 2026 — South Korea. Retrieved October 20, 2026, from https://glostats.com/cities/south-korea/sejong/<a href="https://glostats.com/cities/south-korea/sejong/">Sejong Population 2026 — South Korea</a> — GlostatsFigures on this page may be quoted, charted or republished as long as the page is credited with a link. Terms · Download the data as CSV · Embed a live counter.
City populations are GeoNames figures (CC BY 4.0): the latest official census or estimate for the city proper — the municipality, not the wider metropolitan area — so they can differ from "metro area" numbers you see elsewhere. Country populations are live Glostats estimates from the UN World Population Prospects. Distances are great-circle distances between city centres. Page generated 2026-10-20. More about our data.