Yesan County (Yesan-gun) is a county in South Chungcheong Province, South Korea. Famous people from Yesan include independence fighter Yoon Bong-Gil.Sudeoksa, a head temple of the Jogye Order of Korean Buddhism, is located on the southern slopes of Deoksungsan in Deoksan-myeon, Yesan County. Its main hall is daeungjeon (大雄殿), Korea's oldest wooden building and National Treasure 49.In 2009, Yesan was designated a "slow city," one in which traditional cultures and communities are preserved.