Arta (Greek: Περιφερειακή ενότητα Άρτας) is one of the regional units of Greece.

The main mountain ranges are the Athamanika in the northeast, the Pindus in the east, and Valtou in the southeast.

These are (number as in the map in the infobox):[2] Arta was established as a prefecture in 1882 (Greek: Νομός Άρτας).

The territory of the regional unit was ceded to Greece in 1881 by the Ottoman Empire, along with Thessaly, in accordance with the 1878 Congress of Berlin.

As one of the first completed sections of the future Ionia Odos linking Ioannina with Patras and Kalamata, the motorway bypass of the GR-5 around Arta was opened in 1997.