The aim of this article is to provide an account of the main features of the religious systems documented in Celtic Hispania, focusing on the following: 1) the effects of Romanization on the indigenous religions, with an evaluation of the continuities, ruptures and transformations of traditional religious practices; 2) a geography of the cults of the diverse deities, with particular attention paid to the different sources available, regional variations and relations with the rest of the Romano-Celtic world and the areas of Mediterranean Iberia; 3) a review of the typology of sanctuaries, rituals (particularly sacrifice) and the priesthood; 4) an analysis of the system of values of Hispano-Celtic peoples with respect to hospitality, the war-and-banquet ethos and funeral ideology, including the cosmological elements implied by the available sources of information.