Masuria is an ethnographic and geographic region in northern and northeastern Poland, known for its 2,000 lakes. Masuria occupies much of the Masurian Lake District. Administratively, it is part of the Warmian-Masurian Voivodeship. Its biggest city, often regarded as its capital, is Ełk. The region covers a territory of some 10,000 km2 which is inhabited by approximately 500,000 people.