Preveza (Greek: Περιφερειακή ενότητα Πρέβεζας) is one of the regional units of Greece. It is part of the Epirus region. Its capital is the town of Preveza.
The regional unit of Preveza is located northwest of the Ambracian Gulf. The Ionian Sea lies to the west. The terrain is mostly hilly. The mountains of Xerovouni are in the far northeast. Rivers include the Louros in the east, and Acheron in the north.
Its climate is typically Mediterranean with hot dry summers and cool winters. Snow is not uncommon in winter at higher elevations.
The economy of Preveza has rural character, but also has strong comparative advantages in tourism, which is a dynamic and rapidly evolving field of the economic activity.