Asan (Korean pronunciation: [a.san]) is a city in South Chungcheong Province, South Korea. It borders the Seoul Capital Area to the north. Asan has a population of approximately 300,000.
Asan is known for its many hot springs and is a city of spas.
Asan has grown into the neighboring village, Onyang-dong, which is also known for its hot springs.
It is located in the northern part of Chungcheongnam-do. The east-west length is 29 km, the north-south length is 34 km, and the length of the coastline facing Asan Bay is 7.96 km. The area is 542.62㎢, accounting for 6.6% of the total area of Chungcheongnam-do. As of 2020, the population was 332,124, which is about 15% of the total population of Chungcheongnam-do.
