Regio V Picenum

thumb|300px|Ethnolinguistic map of Italy in the Iron Age, before the Roman expansion and conquest of Italy thumb|285px|right|Augustus' Regio V – Picenum, from the 1911 Atlas of William R. Shepherd.

Picenum was a region of ancient Italy. The name was assigned by the Romans, who conquered and incorporated it into the Roman Republic. Picenum became Regio V in the Augustan territorial organisation of Roman Italy. It is now in Marche and the northern part of Abruzzo.