The province of Alessandria is an Italian province, with a population of some 425,000, which forms the southeastern part of the region of Piedmont. The provincial capital is the city of Alessandria. With an area of 3,558.83 square kilometres it is the third largest province of Piedmont after the province of Cuneo and the Metropolitan City of Turin. To the north it borders on the province of Vercelli and to the west on the Metropolitan City of Turin and the province of Asti.