Italy is at the south-western margin of the distribution of A. torrentium, with at least two populations in the drainage (a tributary of the Danube) near Tarvisio. To the south-east, the species has entered the Drin River in Albania, and was discovered in 2005 in the European part of Turkey. In Romania, it is present in the Apuseni Mountains and in the Carpathian foothills to the southwest, overlapping slightly with the distribution of the noble crayfish Astacus astacus.