Diocese of Oradea

Diocese of Oradea may refer to one of several dioceses in Oradea, Romania:


 * Roman Catholic Diocese of Oradea Mare
 * Greek Catholic Diocese of Oradea Mare
 * Reformed Diocese of Királyhágómellék, sometimes referred to as the Reformed Diocese of Oradea
 * Romanian Orthodox Diocese of Oradea (see Episcopia Ortodoxă Română a Oradiei)