From Augustus (31BC) to the Fall of the Western Empire (476AD)
The Julio-Claudian and Flavian Dynasties
- Augustus – Imperator Caesar Divi Filius Augustus (31BC-14AD)
- Tiberius – Tiberius Caesar Augustus (14-37)
- Caligula/Gaius – Gaius Caesar Augustus Germanicus (37-41)
- Claudius – Tiberius Claudius Caesar Augustus Germanicus (41-54)
- Nero – Nero Claudius Caesar Augustus Germanicus (54-68)
- Galba – Servius Galba Imperator Caesar Augustus (68-69)
- Otho – Imperator Marcus Otho Caesar Augustus (69)
- Vitellius – Aulus Vitellius Germanicus Imperator Augustus (69)
- Vespasian – Imperator Vespasian Caesar Augustus (69-79)
- Titus – Imperator Titus Caesar Vespasianus Augustus (79-81)
- Domitian – Imperator Caesar Domitianus Augustus (81-96)
The Adoptive Emperors and the Antonine Dynasty
- Nerva – Imperator Nerva Caesar Augustus (96-98)
- Trajan – Imperator Caesar Divi Nervae Filius Nerva Traianus (98-117)
- Hadrian – Imperator Caesar Traianus Hadrianus Augustus (117-138)
- Antoninus Pius – Imperator Titus Aelius Caesar Hadrianus Antoninus Augustus Pius (138-161)
- Marcus Aurelius – Imperator Caesar Marcus Aurelius Antoninus Augustus (161-180)
- Lucius Verus – Imperator Caesar Lucius Aurelius Verus Augustus (161-169)
- Commodus – Aurelius Commodus Antoninus Augustus (180-192)
- Pertinax – Imperator Caesar Publius Helvius Pertinax Augustus (193)
- Didius Julianus – Imperator Caesar Marcus Didius Severus Julianus Augustus (193)
The Severan Dynasty
- Septimius Severus – Imperator Caesar Lucius Septimius Severus Pertinax Augustus (193-211)
- Caracalla – Imperator Caesar Marcus Aurelius Severus Antoninus Pius Augustus (211-217)
- Geta – Imperator Caesar Publius Septimius Geta Augustus (211)
- Macrinus – Marcus Opellius Severus Macrinus Augustus (217-218)
- Elagabalus – Imperator Marcus Aurelius Antoninus Pius Felix Augustus Proconsul (218-222)
- Alexander Severus – Imperator Caesar Marcus Aurelius Severus Alexander Pius Felix Augustus (222-235)
The Time of Chaos
- Maximinus Thrax – Imperator Caesar Gaius Julius Verus Maximinus Pius Felix Invictus Augustus (235-238)
- Gordian I – Imperator Caesar Marcus Antoninus Gordianus Sempronianus Romanus Africanus (238)
- Gordian II – Imperator Caesar Marcus Antoninus Gordianus Sempronianus Romanus Africanus (238)
- Pupienus – Imperator Caesar Marcus Clodius Pupienus Maximus Augustus (238)
- Balbinus – Imperator Caesar Decius Caelius Calvinus Balbinus Pius Felix Augustus (238)
- Gordian III – Imperator Caesar Marcus Antonius Gordianus Pius Felix Augustus (238-244)
- Philip the Arab – Imperator Caesar Marcus Julius Phillipus Pius Felix Invictus Augustus (244-249)
- Decius – Imperator Caesar Gaius Messius Quintus Traianus Decius Pius Felix Invictus Augustus (249-251)
- Trebonius Gallus – Imperator Caesar Gaius Vibius Trebonianus Gallus Pius Felix Invictus Augustus (251-253)
- Aemilius Aemilianus – Imperator Caesar Marcus Aemilius Aemilianus Pius Felix Invictus Augustus (253)
- Valerian – Imperator Caesar Publius Licinius Valerianus Pius Felix Invictus Augustus (253-260)
- Gallienus – Imperator Caesar Publius Licinius Egnatius Gallienus Pius Felix Invictus Augustus (253-268)
- Claudius II – Imperator Caesar Marcus Aurelius Claudius Pius Felix Invictus Augustus (268-270)
- Quintillus – Imperator Caesar Marcus Aurelius Claudius Quintillus Invictus Pius Felix Augustus (270)
- Aurelian – Imperator Caesar Lucius Domitius Aurelianus Pius Felix Invictus Augustus (270-275)
- Tacitus – Imperator Caesar Marcus Claudius Tacitus Pius Felix Augustus (275-276)
- Florianus – Imperator Caesar Marcus Annius Florianus Pius Felix Augustus (276)
- Probus – Imperator Caesar Marcus Aurelius Probus Pius Felix Invictus Augustus (276-282)
- Carus – Imperator Caesar Marcus Aurelius Carus Pius Felix Invictus Augustus (282-283)
- Numerian – Imperator Caesar Marcus Aurelius Numerianus Pius Felix Augustus (283-284)
- Carinus – Imperator Caesar Marcus Aurelius Carinus Pius Felix Invictus Augustus (283-285)
The Gallic Empire
- Postumus – Imperator Caesar Marcus Cassianus Latinius Postumus Pius Felix Invictus Augustus (260-269)
- Laelianus – Imperator Caesar Gaius Ulpius Cornelius Laelianus Pius Felix Augustus (269)
- Marius – Imperator Caesar Marcus Aurelius Marius Pius Felix Augustus (269)
- Victorinus – Imperator Caesar Marcus Piavonius Victorinus Pius Felix Invictus Augustus (268-271)
- Tetricus – Imperator Caesar Gaius Pius Esuvius Tetricus Felix Invictus Augustus (271-274)
The Empire Restored
- Diocletian – Imperator Caesar Gaius Aurelius Valerius Diocletianus Pius Felix Invictus Augustus (284-305)
- Maximian – Imperator Caesar Gaius Aurelius Valerius Maximianus Pius Felix Invictus Augustus (286-305, 307-308)
- Constantius I – Imperator Caesar Gaius Flavius Valerius Constantius Augustus (305-306)
- Galerius – Imperator Caesar Galerius Valerius Maximianus Pius Felix Invictus Augustus (305-311)
- Severus II – Imperator Severus Pius Felix Augustus (306-307)
- Maxentius – Marcus Aurelius Valerius Maxentius Pius Felix Invictus Augustus (306-312)
- Maximinus Daia – Imperator Caesar Galerius Valerius Maximinus Pius Felix Augustus (310-313)
- Constantine – Imperator Caesar Flavius Constantinus Pius Felix Invictus Augustus (307-337)
- Licinius – Imperator Caesar Gaius Valerius Licinius Pius Felix Invictus Augustus (308-324)
The Heirs of Constantine
- Constantine II – (337-340)
- Constans I – (337-350)
- Constantius II – (337-361)
- Julian – (360-363)
- Jovian – (363-364)
The Division of the Empire
The West
- Valentinian I – (364-375)
- Gratian – (367-383)
- Valentinian II – (375-392)
- Eugenius [usurper] – (392-394)
- Theodosius I – (379-395)
- Honorius – (395-423)
- Johannes [usurper] – (423-425)
- Valentinian III – (425-455)
- Petronius Maximus – (455)
- Avitus – (455-456)
- Majorian – (457-461)
- Libius Severus – (461-465)
- Anthemius – (467-472)
- Olybrius – (472)
- Glycerius – (473-474)
- Julius Nepos – (474-475)
- Romulus Augustulus [deposed] – (475-476)