The Masurians or Mazurs (, , Masurian: Mazurÿ) are a small Lechitic sub-ethnic group of about 5,000–15,000 people traditionally present in what is now Warmian-Masurian Voivodeship, Poland. In the 2011 Polish census, 1,376 individuals declared themselves to be Masurian either as a first or secondary identification. Before World War II and its post-war expulsions, Masurians used to be a more numerous ethnic group found in the southern parts of East Prussia for centuries following the 16th century Protestant Reformation. Today, most Masurians live in what is now Germany and elsewhere.