Osei Bonsu (1779 – 21 January 1824) was the Asantehene (King of the Ashanti). He reigned from 1804 to 1824. During his reign the Ashanti fought the Fante confederation and ended up dominating Gold Coast trade. In Akan, Bonsu means whale (the largest and most powerful "fish" in the sea), and is symbolic of his achievement of extending the Ashanti Empire to the coast. He died in Kumasi, and was succeeded by Osei Yaw Akoto.
Other sources refer to him as Osei Tutu Kwame.