French Sudan was a French colonial territory in the Federation of French West Africa from around 1880 until 1959, when it joined the Mali Federation, and then in 1960, when it became the independent state of Mali. The colony was formally called French Sudan from 1890 until 1899 and then again from 1921 until 1958, and had a variety of different names over the course of its existence. The colony was initially established largely as a military project led by French troops, but in the mid-1890s it came under civilian administration.

The French colonial empire comprised the overseas colonies, protectorates, and mandate territories that came under French rule from the 16th century onward. A distinction is generally made between the "First French colonial empire", that existed until 1814, by which time most of it had been lost or sold, and the "Second French colonial empire", which began with the conquest of Algiers in 1830. On the eve of World War I, France's colonial empire was the second largest in the world after the British Empire.