Naju O clan (Korean: 나주 오씨; Hanja: 羅州 吳氏) was one of the Korean clans.
Their Bon-gwan was in Naju, South Jeolla Province.
According to the research in 2015, the number of Naju O clan was 18152.
Their founder was O Eon [ja].
He served as government official during Goryeo period and was a descendant of O Cheom (Hanja: 吳瞻) who came over from China to Silla during Jijeung of Silla’s reign in Silla dynasty.