Oradea is a city in Romania, located in the Crișana region. The seat of Bihor County, Oradea is one of the most important economic, social and cultural centers in the western part of Romania. The city is located in the north-west of the country, nestled between hills on the Crișana plain and situated on the banks of the river Crișul Repede that divides the city into almost equal halves.

The Diocese of Oradea is a Latin Church ecclesiastical territory of the Catholic Church in Romania, named after its episcopal see in the city of Oradea.