Hispania Ulterior was a Roman province located in Hispania during the Roman Republic, roughly located in Baetica and in the Guadalquivir valley of modern Spain and extending to all of Lusitania and Gallaecia. Its capital was Corduba.

Hispania was the Roman name for the Iberian Peninsula and its provinces. Under the Roman Republic, Hispania was divided into two provinces: Hispania Citerior and Hispania Ulterior. During the Principate, Hispania Ulterior was divided into two new provinces, Baetica and Lusitania, while Hispania Citerior was renamed Hispania Tarraconensis. Subsequently, the western part of Tarraconensis was split off, initially as Hispania Nova, which was later renamed "Callaecia". From Diocletian's Tetrarchy onwards, the south of the remainder of Tarraconensis was again split off as Carthaginensis, and all of the mainland Hispanic provinces, along with the Balearic Islands and the North African province of Mauretania Tingitana, were later grouped into a civil diocese headed by a vicarius. The name Hispania was also used in the period of Visigothic rule.