| Queen Hyohyeon 효현왕후 孝顯王后 | |
| Succession: | Queen consort of Joseon |
| Reign: | 1837 – 18 October 1843 |
| Reign-Type: | Tenure |
| Predecessor: | Queen Sunwon |
| Successor: | Queen Hyojeong |
| Father: | Kim Jo-Geun |
| Mother: | Internal Princess Consort Hanseong of the Hansan Yi clan |
| Spouse: | King Heonjong of Joseon |
| Birth Date: | 27 April 1828 |
| Birth Place: | Gwangwang-bang, Ahnguk-dong, Hanseong, Joseon |
| Death Place: | Daejojeon Hall, Changdeok Palace, Hanseong, Joseon |
| Posthumous Name: | 단성수원경혜정순효현왕후 端聖粹元敬惠靖順孝顯王后 |
| House: | Andong Kim |
Queen Hyohyeon (; 27 April 1828 – 6 October 1843) of the Andong Kim clan, was the wife and the queen consort of King Heonjong of Joseon, the 24th monarch of the Joseon Dynasty. She was posthumously called as Hyohyeon, the Accomplishment Empress .
Lady Kim was born into the (new) Andong Kim clan [1] on 27 April 1828 in Ahnguk-dong to Kim Jo-geun and Lady Yi of the Hansan Yi clan.
Through her father, Lady Kim is the 6th great-grandniece of Queen Inmok. Thus making Queen Cheorin her seventh cousin and Queen Sunwon her sixth cousin.
Lady Kim later became Queen Consort to the young King Heonjeong at the age of 10 in 1837. Her mother was given the royal title of “Internal Princess Consort Hanseong to the Internal Prince”, and her father was given the royal title of “Internal Prince Yeongheung” .
In 1843, the young Queen died at the age of 15 within Changdeok Palace’s Daejojeon Hall without offspring. Her cause of death was unknown.
She is buried in Gyeongreung in Guri, Gyeonggi Province with King Heonjong and his second wife, Queen Hyojeong.
King Cheoljong added “Gyeonghye” in 1851 and “Danseong” in 1853. In 1866, King Gojong added “Suwon”, and finally in 1908 during King Sunjong’s reign, he posthumously made her empress and added “Seong” .