Duke Gangneung or Duke Gangreung (died 1146), personal name Wang On (왕온, 王溫; later changed into Gim On (김온, 金溫)) was a Goryeo Royal family member as the grandson of King Munjong. Through his daughters, he became the father-in-law of the three successive kings (Uijong, Myeongjong, Sinjong) and the maternal grandfather of Huijong and Gangjong. He was known before as Marquess Gangneung.