Dauriya (Russian: Даурия, also romanized as Dauriia or Dauria) is a historical and geographical region of Russia spanning modern Buryatia, Zabaykalsky Krai and the Amur Region. The toponym is given according to the Daur people who inhabited the region until the middle of the 17th century, about whom it first became known after the expedition of Enalei Bakhteyarov in 1640.
The informal term "Dauriya" may be expanded to adjacent territories of Mongolia and even parts of China, see, e.g., Daurian forest steppe