With the conquest of the Iberian Peninsula by the Roman Empire, the different societies in the north, north-west, north-east, east, and centre were grouped into the same province, Hispania Tarraconensis. This article sets out to assess whether this new, Roman, territorial organization affected previous animal husbandry and hunting practices. The taxonomic and osteometric study of faunal remains from ninety-four sites dated between the fifth century bc and third century ad provides an overview of animal husbandry and hunting before and after the Roman conquest. It shows that important changes took place and that this province was differentially exploited in terms of animal husbandry.