This category contains articles on the House of Theodosius (379–455) of Roman Emperors of the Western Roman Empire (and of the Eastern Roman Empire until 457 and of the Papacy from 422 to 432), particularly articles on individuals who were a member of it by blood, marriage alliance or association.

It should be noted that there were close dynastic ties between the House of Theodosius and the preceding Valentinian Dynasty (see:Category:Valentinianic dynasty).