The Buna (Serbian Cyrillic: Буна) is a short river in Bosnia and Herzegovina; it is a left-bank tributary of the Neretva.

Vrelo Bune is one of the strongest springs in Europe and has extremely cold water.

[3][4] The Buna flows west for approximately 9 km, starts at Blagaj and, meandering through the villages of Blagaj, Kosor, Malo Polje and Hodbina, joins the Neretva near the settlement Buna.

The Bunica river is the main left-bank tributary of the Buna.

This article related to a river in Bosnia and Herzegovina is a stub.