Naples is the regional capital of Campania, located in southern Italy. It serves as the largest city in southern Italy and ranks as the third-largest city in the country, following Rome and Milan. The city's population within its administrative limits is approximately 905,050 as of 2026, while its province-level municipality is the third most populous metropolitan city in Italy with 2,954,847 residents.
The broader metropolitan area of Naples is the seventh most populous in the European Union, housing approximately 4.4 million people across a region extending roughly 30 kilometres beyond the city proper. The city serves as an important hub for international diplomacy, hosting both the Parliamentary Assembly of the Mediterranean and NATO's Allied Joint Force Command Naples.