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)
See also Mazowiecki (disambiguation)