The Metropolitan City of Cagliari is a metropolitan city in Sardinia, Italy. Its capital is the city of Cagliari and includes 17 comuni. It was established by law in 2016 and replaced the province of Cagliari. The current president is the mayor of Cagliari, Paolo Truzzu. The resident population is approximately 432,000. This figure can rise due to commuting into the functional urban area to approximately 477,000.

The 14 metropolitan cities of Italy are administrative divisions of Italy, operative since 2015, which are a special type of province. The metropolitan city, as defined by law, includes a large core city and the surrounding suburbs and countryside closely related to it by economic activities and essential public services, as well as to cultural relations and to territorial features.