The Weiße Elster (in Czech: Bílý Halštrov) is a 257 km long river in central Europe. Its source is in the westernmost part of the Czech Republic, near Aš. After a few km, it flows into eastern Germany. In Germany, it flows through the states of Saxony, Thuringia and Saxony-Anhalt.

The Weiße Elster flows through the cities of Plauen, Greiz, Gera, Zeitz and Leipzig. It flows into the River Saale near Merseburg.

There is also a river called the Schwarze Elster in eastern Germany.