Tongyeong is a coastal city in South Gyeongsang Province, South Korea. In 2010, it had an area of 238.81 km2 (92.21 sq mi) and a population of 139,869 people. It is divided into 1 eup (town), 6 myeon (township) and 11 dong (neighborhood). Chungmu city and Tongyeong county were reunited in 1995, creating Tongyeong City as it is known today. It consists of Goseong Peninsula, Hansan Island, Mireuk Island, Yokji Island and other islets. It was formerly known as Chungmu, after the posthumous name of Admiral Yi Sun-sin. The name Tongyeong means "command post" and is itself associated with Admiral Yi, as it refers to his principal base that was located on nearby Hansan Island.

South Gyeongsang Province is a province in the southeast of South Korea. The provincial capital is at Changwon. It is adjacent to the major metropolitan center and port of Busan. The UNESCO World Heritage Site Haeinsa, a Buddhist temple that houses the Tripitaka Koreana and tourist attraction, is located in this province. Automobile and petrochemical factories are largely concentrated along the southern part of the province, extending from Ulsan through Busan, Changwon, and Jinju.