| Queen Sinmyeong 신명왕후 | |
| Succession: | Queen consort of Goryeo |
| Reign: | ?–943 |
| Reign-Type: | Tenure |
| Predecessor: | Queen Janghwa |
| Successor: | Queen Uihwa |
| Succession1: | Queen dowager of Goryeo |
| Reign1: | 945–949 |
| Reign-Type1: | Tenure |
| Coronation1: | 945 |
| Predecessor1: | Dynasty established (Queen Mother Gyeongsun as the last Queen dowager of Silla) |
| Successor1: | Queen Dowager Sinjeong |
| Regent1: | King Jeongjong (son) King Gwangjong (son) |
| Reg-Type1: | Monarch |
| Father: | Yu Geung-dal (유긍달)[1] |
| Spouse: | Taejo of Goryeo |
| Issue: | Wang Tae Wang Yo Wang So Wang Jeong Jeungtong Princess Nakrang Princess Heungbang |
| Birth Date: | ? |
| Birth Place: | Chungju, North Chungcheong Province |
| Death Date: | ? |
| Death Place: | Goryeo |
| Regnal Name: |
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| House: | Chungju Yu clan |
Queen Sinmyeong of the Chungju Yu clan[2] 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.[3] [4]
During Taejo's lifetime, she was addressed as Grand Lady Chungjuwon (충주원대부인, 忠州院大夫人; "Grand Lady of the Chungju Courtyard"). Then, during their sons' reign, she was addressed as Queen Mother Sinmyeongsunseong (신명순성태후, 神明順成太后) and Grand Queen Mother Sinmyeongsunseong (신명순성왕태후, 神明順成王太后). 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.