In the Balkan Peninsula, Potamon fluviatile is known to occur in Croatia, Montenegro, North Macedonia, Albania and Greece. There are four species of Potamon in the Balkans, and P. fluviatile is replaced by Potamon ibericum in northeastern Greece. In mainland Greece, P. fluviatile is found in the drainages of the Axios, Thyamis, Aheron and Arachthos, Pineiós, Piros-Tethreas, Pamisos and Evrotas rivers.
