The Tisza or Tisa is one of the main rivers of Central Europe. Once, it was called "the most Hungarian river" because it flowed entirely within the Kingdom of Hungary. Today, it crosses several national borders.
The Tisza begins near Rakhiv in Ukraine, at the confluence of the White Tisa and Black Tisa (the former springs in the Chornohora mountains; the latter in the Gorgany range). From there, the Tisza flows west, roughly following Ukraine's borders with Romania and Hungary, then into Hungary, and finally into Serbia. It enters Hungary at Tiszabecs. It traverses Hungary from north to south. A few kilometers south of the Hungarian city of Szeged, it enters Serbia. Finally, it joins the Danube near the village of Stari Slankamen in Vojvodina, Serbia.
The Tisza drains an area of about 156,087 km2 (60,266 sq mi) and has a length of 1,419 km (882 mi)— seco Its mean annual discharge is 792 m3/s (28,000 cu ft/s). It contributes about 13% of the Danube's total runoff.