Bucharest is the capital and largest city of Romania. The metropolis stands on the River Dâmbovița in south-eastern Romania. Its population is officially estimated at 1.71 million residents within a greater metropolitan area of 2.31 million residents, which makes Bucharest the 9th most-populous city by population within city limits in the European Union. The city has an area of 240 km2 (93 sq mi), while the metropolitan area covers 1,811 km2 (699 sq mi). The city proper is administratively known as the "Municipality of Bucharest", and has the same administrative level as that of a national county, being further subdivided into six sectors, each governed by a local mayor. Bucharest is a major cultural, political and economic hub, the country's seat of government, and the capital of the Muntenia region. It is an enclave completely surrounded by Ilfov County.