The Drava or Drave (Drau, ˈdʁaʊ; Drava ˈdɾàːʋa; Drava drǎːʋa; Dráva ˈdraːvɒ; Drava ˈdraːva), historically known as the Dravis or Dravus, is a river in southern Central Europe. With a length of 710 km, 724 km including the Sextner Bach source, it is the fifth or sixth longest tributary of the Danube, after the Tisza, Sava, Prut, Mureș and perhaps Siret. The Drava drains an area of about 40 154 km². Its mean annual discharge is seasonally 500 m³/s to 670 m³/s. Its source is near the market town of Innichen, in the Puster Valley of South Tyrol, Italy. The river flows eastwards through East Tyrol and Carinthia in Austria into the Styria region of Slovenia. It then turns southeast, passing through northern Croatia and, after merging with its main tributary Mur, forms most of the border between Croatia and Hungary, before it joins the Danube near Osijek.
In ancient times the river was known as Dravus or Draus in Latin, and in Greek as Δράος and Δράβος. Medie