The Hron (; ; ; ) is a long left tributary of the Danube and the second-longest river in Slovakia. It flows from its source in the Low Tatra Mountains (below Kráľova hoľa) through central and southern Slovakia, emptying into the Danube near Štúrovo and Esztergom. Major cities and towns on the Hron are Brezno, Banská Bystrica, Sliač, Zvolen, Žiar nad Hronom, Žarnovica, Nová Baňa, Tlmače, Levice, Želiezovce, and Štúrovo.
The river's basin covers ,
History
The name of the river was mentioned for the first time in 170, when Roman Emperor Marcus Aurelius wrote his Meditations at the Hron () river. The first recorded medieval name was Gron (1075).