Sacheon (säˈchônˈ) [key], city (1995 pop. 113,492), South Gyeongsang (Kyongsang) prov., S South Korea, on the Korea Strait. It is a port city on Sacheon Bay, with aerospace, machinery, and metalworking industries, food processing, agriculture, fishing, and forestry, and pottery and tile making. Hallyeo Maritime National Park is nearby. The bay was the site of a Korean naval victory (1592) over the Japanese. The city was formed in 1995 by the merger of the port city of Samcheonpo and Sacheon county.