List of Roman Emperors.
- Julius Caesar (100 B.C. - 44. B.C.), technically Dictator, not Imperator
- Augustus (27 B.C. - A.D. 14)
- Tiberius (14 - 37)
- Caligula (37 - 41)
- Claudius (41 - 54)
- Nero (54 - 68)
- Galba (68)
- Otho (69)
- Vitellius (69)
- Vespasian (69 - 79)
- Titus (79 - 81)
- Domitian (81 - 96)
- Nerva (96 - 98)
- Trajan (98 - 117)
- Hadrian (117 - 138)
- Antoninus Pius (138 - 161)
- Marcus Aurelius (161 - 180)
- Lucius Verus (180 - ?
- Commodus (180 - 193)
- Septimius Severus (193 - 211)
- Caracalla (211 - 217)
- Macrinus (217–218)
- Heliogabalus (218 - 222)
- Alexander Severus (222 - 235)
- Maximinus Thrax (235 - 238)
- Balbinus (238)
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- Gordian III ([[238-244)
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- Philip the Arab (244-249)
- Trajan Decius (249-251)
- Trebonianus Gallus (251-253)
- Aemilianus (253)
- Gallienus (253-268)
- Valerian I (253-260)
- Aurelian
- Diocletian (284 to 305)
- Maximian
- Constantius Chlorus
- Galerius
- Maxentius
- Licinius
- Constantine I, the Great
- Constantine II
- Constans
- Constantius
- Julian, known as 'the Apostate'
- Jovian
- Valentinian I (364 - 375) - west
- Valens
- Gratianus
- Valentinian II
- Theodosius I
- Arcadius - east
- Honorius - west
- Theodosius II - east
- Valentinan III - west
- Marcian - east
- Maximus - west
- Avitus - west
- Leo I - east
- Majorian - west
- Severus - west
- Anthemius - west
- Olybrius - west
- Glycerius - west
- Zeno - east
- Romulus Augustus (a.k.a. Romulus Augustulus) 'last' western emperor
See also list of East Roman Emperors or Byzantine Emperors
/JulioClaudian family tree