The following is an attempted list usurpers of the Roman Empire. For an overview of the problem and consequences of usurpation see Roman usurpers.

Key:

  • kPG, killed by the Praetorian guard
  • kS, killed by own soldiers
  • kB, killed in battle
  • e, executed
  • dates are beginning and end of reign
  • origin of the rebellion indicated where possible
  • the list is complete until the advent of the tetrarchy in the end of the 3rd century

Table of contents
1 Emperor usurpers
2 Unsuccessful usurpers in the 3rd century

Emperor usurpers

This is a listing of Roman emperors that so became due to their own initiative with neither family ties to the previous nor senatorial appointement.

First Roman Imperial civil war: the year of the four emperors (69 AD)

From 193 to the tetrarchy (crisis of the third century)

Unsuccessful usurpers in the 3rd century

List of to be emperors eventually defeated by the ruling sovereign, listed by reign. The noted date is the attempted usurpation.

Heliogabalus: 218-222

Alexander Severus: 222-235

Maximinus Thrax: 235-238

  • Magnus (235), in the Rhine, a former consul
  • Quartinus (235), in the East

Gordian III: 238-244

Philip the Arab: 244-249

Decius: 249-251

Gallienus: 253-268

  • Ingenuus (260) in Pannonia, committed suicide, former governor
  • Macrianus Major, Macrianus Minor and Quietus (September 260 – Autumn 261) in the East, all killed by their own soldiers in different occasions
  • Regalianus (260) in Pannonia, ruled with his wife
  • Ballista (Autumn e.261) in the East, former Praetorian prefect, associated with the former
  • Piso (kS.261) in Achaea, questioned existence
  • Valens (k.261) in Achaea, killed by Macrinus, former governor
  • Memor (e.261) in Egypt
  • Mussius Aemilianus (261 - Spring e.262) in Egypt
  • The emperors of the Gallic Empire
  • The fictitious usurpers:
    • Celsus
    • Saturninus
    • Trebellianus

Claudius II: 268-270

Aurelian: 270-275

  • Domitianus (270-271)
  • Felicissimus (k.271) in Rome, a civil servant involved in corruption
  • Septimius (kS.271) in Dalmatia
  • Urbanus (271), questioned existence
  • Firmus (k.273) in Egypt, questioned existence

Probus: 276-282

  • Bonosus (280)
  • Proculus (280)
  • Saturninus (280)