The province was created by Royal Decree n. 3702 of 23 October 1859, the , as a union of five of the six provinces which had formed the Division of Alessandria (the provinces of
Alessandria,
Acqui,
Asti,
Casale and
Tortona) plus the province of
Novi which had formed part of the Division of Genoa. In 1935 the area of Asti was established as the separate
Province of Asti. ==Municipalities==