Jangheung County () is a county in South Jeolla Province, South Korea.
In 2007 Jangheung was designated as a slow city. It was the first slow city designation in Asia.
Festival (1996) was filmed in Jangheung county by director Im Kwon-taek.
Jangheung's Cheonkwan Mt. is known for its scenery and eulalias. These plants reach full height around mid-September and until October.
The county is known for its production of Shiitake mushrooms.
Eco-friendly cultivation methods are used county-wide to raise crops used in Korean medicine. Jangheung county received an official award in 2006 for growing high-quality crops.