The entire basin is drained by only one river, the Danube, which flows into the Black Sea.
All major rivers in Serbia, like Tisa, Sava, Velika Morava and Drina belong to it.
The Adriatic Sea drainage basin covers an area of 4,500 km2 or 5% of territory of Serbia.
Smaller portion of it is drained by Crni Kamen-Radika river in the extreme southern region of Gora, which also drains into Black Drin in North Macedonia.
All three basins meet at the Drmanska glava peak on the Crnoljeva mountain in central Kosovo, which represents the water divide of Serbia and the major one in the Balkans, as it divides three out of the Balkan's four drainage basins (the fourth being the Ionian Sea).