The Warsaw Metro is a rapid transit underground system serving the Polish capital Warsaw. It currently consists of two lines, the north–south Line M1 which links central Warsaw with its densely populated northern and southern districts, and the east–west Line M2. Three more lines are still being planned. The system is operated by Metro Warszawskie sp. z o.o., a company owned by the city, and managed by Zarząd Transportu Miejskiego w Warszawie. As of 2024 it is the only metro system in Poland.

Warsaw, officially the Capital City of Warsaw, is the capital and largest city of Poland. The metropolis stands on the River Vistula in east-central Poland. Its population is officially estimated at 1.86 million residents within a greater metropolitan area of 3.27 million residents, which makes Warsaw the 7th most-populous city in the European Union. The city area measures 517 km2 (200 sq mi) and comprises 18 districts, while the metropolitan area covers 6,100 km2 (2,355 sq mi). Warsaw is an alpha global city, a major cultural, political and economic hub, and the country's seat of government. It is also capital of the Masovian Voivodeship.