Queen Sinjeong of the Hwangju Hwangbo clan (; d. 19 August 983) was the fourth wife of Taejo of Goryeo who became the mother of Daejong of Goryeo and Queen Daemok. All of the Goryeo kings after Gyeongjong were her descendants.
The future Queen Sinjeong was born as the daughter of Hwangbo Je-gong, Duke Chungui () who was one of the Three Major Grand Masters () from Hwangju, North Hwanghae Province.
She married Wang Geon () as his second wife after he ascended the throne as the first King of Goryeo. Since at that time he already had a Queen, Hwangbo initially became a Royal consort and was given the royal title of Lady Hwangjuwon (). Together, they had a son who would become the father of King Seongjong and a daughter who later became the first wife of King Gwangjong. One of Geon's grandson, King Gyeongjong honoured her as Grand Lady Myeongbok () and ordered her to live in Myeongbok Palace ().
She outlived her husband by 40 years and died at about 80 years old. Since her only son and his wife died young, all of their children were raised by Queen Sinjeong and she devoted her entire affection to them. It as said that Queen Sinjeong had a virtuous personality and was respected by the officials for being frugal and wise.
After her death on 19 August 983, she was promoted from a Royal consort's position into Queen Mother Sinjeong () and was buried in Sureung tomb; she also received a posthumous name.