Yu Deuk-gong (; 1749–1807) was a Korean scholar during the Joseon Dynasty. He is remembered today for his work in recovering the history of Balhae, which had not generally been considered part of Korean history before his time.
See also History of Korea Balhaego
References Yu, Deuk-gong. "Yu Tŭkkong: Parhae in Korean history," pp. 186–187 in
External links Dusan Encyclopedia article, in Korean