Mazovian

The adjective Mazovian (or Masovian) may refer to:


 * Mazovia, a historic, geographical and cultural region of Poland
 * Masovians, an ethnic group in Poland
 * Masovian dialect, the dialect of Polish spoken in Mazovia
 * Masovian (European Parliament constituency)
 * Masovian Voivodeship, an administrative region of present-day Poland, centred on Warsaw
 * Masovian Voivodeship (1526–1795)