Map of Sejong, South Korea

Sejong is the administrative centre of Sejong-si, South Korea, with a population of about 394,630. It lies at 36.5924°N, 127.2922°E. Sejong is about 112 km (69 mi) south of Seoul, the capital. The nearest city on our map is Cheongju-si, 18 km to the east.

Sejong at a glance

Where is Sejong?

• The 25th largest city in South Korea by recorded population.
• Located in the Northern and Eastern hemispheres.
• Daylight ranges from about 9 h 39 min on the shortest day to 14 h 40 min on the longest day (around 21 December and 21 June).

Cities near Sejong

• Cheongju-si — 18 km east
• Gongju — 21 km southwest
• Cheonan — 27 km northwest
• Daejeon — 28 km south
• Chinch'ŏn — 32 km northeast
• Asan — 33 km northwest
• Okcheon — 41 km southeast
• Yesan — 41 km west
• Anseong — 47 km north
• Nonsan — 47 km southwest

Largest cities in South Korea

• Seoul — 10,349,312
• Busan — 3,285,147
• Incheon — 3,015,482
• Daegu — 2,365,523
• Daejeon — 1,441,203
• Gwangju — 1,401,235
• Suwon — 1,234,582
• Ulsan — 1,098,421
• Goyang-si — 1,061,752
• Changwon — 1,025,702

Map of South Korea and all its cities →

Sources: place names, coordinates, populations and time zones from GeoNames (CC BY 4.0, data retrieved October 2026). Population figures are the latest values recorded in GeoNames; depending on the country they refer to the city proper, a municipality or a wider urban area, so they can differ from census or metro-area figures. Map © OpenStreetMap contributors.