This is a list of known governors of the trans-Danubian Roman province of Dacia, referred to as Dacia Traiana. Created in AD 106 by the Roman emperor Trajan after the final defeat of Decebalus' Dacian kingdom, it was originally a single province under the name Dacia, governed by a Legatus Augusti pro praetore. In 118, Hadrian reorganised the province, abandoning some territory in the east and relabelling the province Dacia Superior. At the same time he split Moesia Inferior, with the territory north of the Danube renamed as Dacia Inferior. In 123, Hadrian created a third Dacian province, Dacia Porolissensis, fashioning it out of territory from the northern portion of Dacia Superior.