Prehistory in the Iberian peninsula begins with the arrival of the first Homo genus representatives from Africa, which may range from c. 1.5 million years (Ma) ago to c. 1.25 Ma ago, depending on the dating technique employed, so it is set at c. 1.3 Ma ago for convenience. The end of Iberian prehistory coincides with the first entrance of the Roman army into the peninsula, in 218 before Christ (BC), which led to the progressive dissolution of pre-Roman peoples in Roman culture. This end date is also conventional, since pre-Roman writing systems can be traced to as early as 5th century BC.

The Iberian Peninsula, also known as Iberia, is a peninsula in South-western Europe, defining the westernmost edge of Eurasia. It is divided between Continental Portugal and Peninsular Spain, comprising most of the region, as well as Andorra, Gibraltar, and a small part of Southern France. With an area of approximately 583,254 square kilometres (225,196 sq mi), and a population of roughly 55 million, it is the second-largest European peninsula by area, after the Scandinavian Peninsula.