Muan County (Muan-gun) is a county in South Jeolla Province (Jeollanam-do), South Korea. In 2005, Muan County became the capital of Jeollanam-do following the transfer of the provincial office from its previous location, Gwangju to the village of Namak in Muan. Muan International Airport was opened here, and will eventually replace the airports in Gwangju and Mokpo.

South Jeolla Province, also known as Jeonnam, is a province in the Honam region, South Korea, and the southernmost province in mainland Korea. South Jeolla borders the provinces of North Jeolla to the north, South Gyeongsang to the northeast, and Jeju to the southwest in the Korea Strait.