Borysthenes

right|thumb|300px|Two coins from Pontic Olbia (3rd-1st century BC) depicting the bearded head of the river-god Borysthenes

Borysthenes (; ) is a geographical name from classical antiquity. The term usually refers to the Dnieper River and its eponymous river god, but also seems to have been an alternative name for Pontic Olbia, a town situated near the mouth of the same river on the Black Sea coast, or the earlier settlement on Berezan Island.