List of tributaries of the Danube

This is a list of tributaries of the Danube by order of entrance.

The Danube is Europe's second-longest river. It starts in the Black Forest in Germany as two smaller rivers&mdash;the Brigach and the Breg&mdash;which join at Donaueschingen, and it is from here that it is known as the Danube, flowing generally eastwards for a distance of some 2850 km, passing through several Central and Eastern European capitals, before emptying into the Black Sea via the Danube Delta in Romania.

The Danube flows through&mdash;or forms a part of the borders of&mdash;ten countries: Germany, Austria, Slovakia, Hungary, Croatia, Serbia, Bulgaria, Romania, Moldova, and Ukraine; in addition, the drainage basin includes parts of nine more countries: Poland, Switzerland, Italy, Czech Republic, Slovenia, Bosnia and Herzegovina, Montenegro, North Macedonia and Albania.