The village is first mentioned in 1067 as Byhor, later as Bychor in 1213, as Bihar in 1332, and again, in 1349 as Byhor. The
Gesta Hungarorum, which is believed to have been written around the time of
King Béla III of
Hungary (1172–1196), mentions that
Duke Árpád (born 845) sent envoys to a castle called Bychor, to
Duke Menumorout. Biharia has a complex political history, with periods of the
Kingdom of Hungary,
Eastern Hungarian Kingdom, and the
Principality of Transylvania. With the breakup of
Austria-Hungary at the end of
World War I and the ensuing
Hungarian–Romanian War, the
Romanian Army entered the village, and after
Treaty of Trianon of 1920, Biharia became part of the
Kingdom of Romania. During the
interwar period, it became part of
plasa Centrală, in
Bihor County. In the wake of the
Second Vienna Award of August 30, 1940, the territory of
Northern Transylvania (of which the town of Biharia was part) reverted to the
Kingdom of Hungary. Towards the end of
World War II, the town was taken back from Hungarian and
German troops by Romanian and
Soviet forces in
October 1944, during the initial stages of the
Battle of Debrecen. Following the
administrative reform of 1950, the commune became fell in Oradea
Raion, within
Bihor Region (renamed Oradea Region in 1952 and Crișana Region in 1960). In 1968, the old territorial division into
județe was reinstituted, and Biharia reverted to being part of Bihor County. ==Demographics==