Hannibal Sehested (1609 – 23 September 1666) was a Dano-Norwegian statesman and son-in-law of King Christian IV. He served as Governor-general of Norway from 1642 to 1651, where he fought the Torstenson War against Sweden and implemented many reforms. After a fall from grace leading to his resignation as Governor-general in 1651, he regained the trust of Frederick III in 1660 and negotiated the Treaty of Copenhagen. He worked as lord treasurer and councillor of state until his death in 1666.