Oradea is a city in Romania, situated in the Crișana region. It serves as the administrative seat of Bihor County and is a key economic, social…Oradea is a city in Romania, situated in the Crișana region. It serves as the administrative seat of Bihor County and is a key economic, social, and cultural center in northwestern Romania. The city lies between rolling hills on the Crișana plain, on both banks of the Crișul Repede river.