Preveza (Greek: Πρέβεζα) is a town in northwestern Greece, located at the mouth of the Ambracian Gulf. It is the capital of Preveza Prefecture, which is part of the periphery of Epirus. A new undersea tunnel, which runs between Preveza and Aktio of Acarnania (see Actium), connects the town to Lefkada and western Aetolia in Aetolia-Acarnania. The ruins of the ancient city of Nicopolis lie 5 km north of the city.

Preveza has TEI(Technological University)Oikonomic School, schools, lyceums or middle schools, gymnasia or secondary schools, churches, a post office, banks, restaurants, a port, supermarkets and squares (plateies).

Preveza is also the place which saw the Battle of Actium, where Augustus' forces defeated Mark Antony and Cleopatra and the subsequent building of Nicopolis (victory city). As such, it is a pivotal site for world history.

Preveza is the location of the 1538 Battle of Preveza, where the outnumbered Turkish fleet of Barbarossa defeated Andrea Doria.