The Hungarian diaspora or Magyar diaspora refers to ethnic Hungarians (Magyars) living outside the borders of present-day Hungary. The diaspora can be divided into two main groups.
The first group includes those who are autochthonous to their homeland, living in parts of neighbouring regions that were part of Hungary (Kingdom of Hungary) before the Treaty of Trianon. Following World War I, the Treaty of Trianon in 1920 led to the separation of 32% of ethnic Hungarians, along with many entirely Hungarian-populated regions, from their historical Hungarian motherland. Most of the anti-Hungarian sentiment and incidents still occur today in Hungary's neighboring countries (modern Romania, Serbia, Slovakia, Ukraine), as their predecessor states received large historical Hungarian territories.