The Blue Vanga (Cyanolanius madagascarinus) is a bird species in the family Vangidae. It is in the monotypic genus Cyanolanius. The taxon comorensis, by most authorities considered a subspecies of the Blue Vanga, has occasionally been considered a separate species, the Comoro Blue Vanga (Cyanolanius comorensis).
It is found in Comoros, Madagascar, and Mayotte. Its natural habitats are subtropical or tropical dry forests and subtropical or tropical moist lowland forests.