Cottus transsilvaniae is a species of freshwater ray-finned fish belonging to the family Cottidae, the typical sculpins.

It is endemic to Romania in the upper Arges River in the Danube drainage.

It reaches a maximum length of 9.7 cm.

[2] It prefers rocky shoals and riffles of small upland streams.

his species was described as a separate species from the European bullhead (C. gobio) in 2005 by Jörg Freyhof, Maurice Kottelat and Arne W.