The Basuto Gun War, also known as the Basutoland Rebellion, was a conflict between the Basuto and the British Cape Colony. It lasted from 13 September 1880 to 29 April 1881 and ended in a Basuto victory.

Basutoland was a British Crown colony that existed from 1884 to 1966 in present-day Lesotho, bordered with the Cape Colony, Natal Colony and Orange River Colony until 1910 and completely surrounded by South Africa from 1910. Though the Basotho and their territory had been under British control starting in 1868, the Cape Colony was unpopular and unable to control the territory. As a result, Basutoland was brought under direct authority of Queen Victoria, via the High Commissioner, and run by an Executive Council presided over by a series of British Resident Commissioners.