Queen Sinmyeong of the Chungju Yu clan () or long-called as Queen Sinmyeongsunseong () was the third Goryeo queen consort through her marriage as the third wife of Wang Geon, its founder and become the mother of his 5 sons (include Jeongjong and Gwangjong) and 2 daughters.
During Taejo's lifetime, she was addressed as Grand Lady Chungjuwon (; "Grand Lady of the Chungju Courtyard"). Then, during their sons' reign, she was addressed as Queen Mother Sinmyeongsunseong () and Grand Queen Mother Sinmyeongsunseong (). She was the first woman whom Wang Geon met after his ascension to the throne and became the first one who held the position of "Queen Mother" and "Grand Queen Mother" of Goryeo.