| Queen Gyeongseong 경성왕후 | |
| Succession: | Princess of Goryeo |
| Reign: | ?–1034 |
| Predecessor: | Princess Hyogyeong |
| Successor: | Princess Aji |
| Regent: | Wang Sun, King Hyeonjong |
| Reg-Type: | Monarch |
| Succession1: | Queen consort of Goryeo |
| Reign1: | 1034–1034 |
| Reign-Type1: | Tenure |
| Coronation1: | 1034 |
| Predecessor1: | Royal Consort Gyeongmok |
| Successor1: | Queen Yongsin |
| Father: | Hyeonjong of Goryeo |
| Mother: | Pure Consort Wonsun of the Gyeongju Kim clan |
| Birth Date: | 1015 |
| Birth Place: | Goryeo |
| Death Date: | 23 September 1086 (aged 70-71) |
| Death Place: | Goryeo |
| Burial Date: | around 1096 |
| Burial Place: | Jilleung tomb |
| Posthumous Name: | Queen Yujeong Gwansuk Gyeongseong 유정관숙경성왕후 (柔貞寬肅敬成王后) |
| Religion: | Buddhism |
Queen Gyeongseong of the Gyeongju Kim clan (; 1015 – 23 September 1086[1]) was a Goryeo princess as the only daughter of King Hyeonjong and Consort Wonsun who became a queen consort through her marriage with her younger half-brother, King Deokjong as his second (formally as first and primary) wife.[2] [3] From this marriage, Queen Gyeongseong became the ninth reigned Goryeo queen who followed her maternal clan after Queen Wonhwa, her stepmother.
Lady Wang was born in 1015 as the only daughter of Royal Consort Wonsun of the Gyeongju Kim clan and King Hyeongjong of Goryeo.
Through her maternal aunt (the princess’ mother’s younger sister), she was the older first cousins of Queen Inhye, Royal Consort Ingyeong and Royal Consort Injeol; who were the consorts of King Munjong of Goryeo, the future 11th King of Goryeo.
When still a child and royal princess, she was called Oldest Daughter of the Gyeongheung Residence since it was her mother's official residence. Since people of the same clan couldn't get married, she followed her maternal clan (Gyeongju Kim)[4] and became the 19-year-old Deokjong's queen consort in 1034.
However, their marriage lasted only 7 months which Deokjong died in the same year, so she lived about 52 years alone. During her widowed life, she saw the reigns of four monarchs: Jeongjong, Munjong, Sunjong, Seonjong.
She was later buried in Jilleung alongside her late husband[5] when she died in 1086, and received her posthumous name in 1096. Since the couple was childless, the queen couldn't or didn't receive the honorary name unlike the other queen dowagers.