The Battle of Chonan was the third engagement between United States and North Korean forces during the Korean War. It occurred on the night of July 7/8, 1950, in the town of Chonan in western South Korea. The fight ended in a North Korean victory after intense fighting around the town, which occurred throughout the night and into the morning.

The Korean War was fought between North Korea and South Korea from 1950 to 1953. It began on 25 June 1950 when North Korea invaded South Korea and ceased after an armistice on 27 July 1953. North Korea was supported by China and the Soviet Union while South Korea was supported by the United States and US-led United Nations (UN) forces.