Map of Jangseong, South Korea

Jangseong is a city in Jeollanam-do, South Korea, with a population of about 42,129. It lies at 35.2978°N, 126.7844°E. Jangseong is about 253 km (157 mi) south of Seoul, the capital. The nearest city on our map is Koch'ang, 17 km to the northwest.

Jangseong at a glance

Where is Jangseong?

• The 13th largest city in Jeollanam-do on this site.
• Located in the Northern and Eastern hemispheres.
• Daylight ranges from about 9 h 46 min on the shortest day to 14 h 32 min on the longest day (around 21 December and 21 June).

Cities near Jangseong

• Koch'ang — 17 km northwest
• Damyang — 18 km east
• Masan — 19 km south
• Gwangju — 20 km southeast
• Yeonggwang — 25 km west
• Naju — 30 km south
• Hwasun — 32 km southeast
• Jeongeup — 36 km north
• Muan — 44 km southwest
• Yeongam — 56 km south

Largest cities in Jeollanam-do

• Suncheon — 276,375
• Yeosu — 268,823
• Mokpo — 268,402
• Gwangyang — 154,266
• Muan — 92,009
• Kwangyang — 89,281
• Hwasun — 59,914
• Sinan — 53,150
• Yeonggwang — 51,688
• Yeongam — 51,573

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.