Count of Vimioso (in Portuguese Conde de Vimioso) is a Portuguese title of nobility which have its origins in Alphonse, Bishop of Évora, the natural son of Alphonse, 4th Count of Ourém and 1st Marquis of Valença (eldest son of Alphonse I, Duke of Braganza). Therefore, the Counts of Vimioso were closely related to the Braganzas. This title was created on February 2, 1515, by King Manuel I of Portugal for his 3rd cousin, Francisco de Portugal (Francis of Portugal), also known as Francis I, 1st Count of Vimioso, a natural son of Alphonse of Portugal, Bishop of Évora.