Map of Ansan-si, South Korea

Ansan-si is a city in Gyeonggi-do, South Korea, with a population of about 623,256. It lies at 37.3236°N, 126.8219°E. Ansan-si is about 30 km (19 mi) southwest of Seoul, the capital. The nearest city on our map is Anyang-si, 12 km to the northeast.

Ansan-si at a glance

Where is Ansan-si?

• The 17th largest city in South Korea by recorded population.
• The 6th largest city in Gyeonggi-do on this site.
• Located in the Northern and Eastern hemispheres.
• Daylight ranges from about 9 h 35 min on the shortest day to 14 h 44 min on the longest day (around 21 December and 21 June).

Cities near Ansan-si

• Anyang-si — 12 km northeast
• Gunpo — 12 km northeast
• Hwaseong-si — 13 km south
• Suwon — 17 km east
• Gwangmyeong — 18 km north
• Incheon — 18 km northwest
• Bucheon-si — 20 km north
• Osan — 29 km southeast
• Seoul — 30 km northeast
• Seongnam-si — 31 km northeast

Largest cities in Gyeonggi-do

• Suwon — 1,234,582
• Goyang-si — 1,061,752
• Seongnam-si — 914,832
• Bucheon-si — 850,731
• Hwaseong-si — 640,890
• Anyang-si — 595,644
• Uijeongbu-si — 479,141
• Pyeongtaek — 364,694
• Gwangmyeong — 357,545
• Gunpo — 286,485

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.