Roman Emperors

Note: This list contains Rulers, heirs apparent, usurpers, Imperatorial Generals, and a few who are harder to designate. Many of the Augusti also minted coins as Caesarae. There are a few omissions of the more obscure personalities whose coins are very rare or unique.  Please consult more scholarly texts such as David Sear's "Roman Coins and their Values" for the definitive list.
Pompey the Great
Imperator
81 - 48 B.C.
Sextus Pompey
 Imperatorial General 
45  - 35 B.C.
Julius Caesar
 Imperator & Dictator 
61 - 44 B.C.
Brutus 
Imperatorial General
50 - 42 B.C.
Cassius 
Imperatorial General 
50 - 42 B.C.
Ahenobarbus 
Imperatorial General 
42 - 32 B.C.
Marcus Antonius
 Imperator and General 
61- 30 B.C.
Lepidus 
Imperator
46 - 42 B.C.
Augustus (Octavian) 
First Roman Emperor
27 B.C. - 14 A.D.
Agrippa
Imperial General
31 B.C. - 12
Tiberius 
Emperor 
14 - 37 A.D.
Drusus 
Son of Tiberius
23 A.D.
Nero Claudius Drusus 
Brother of Tiberius
Died 9 B.C.
Germanicus 
Nephew and Adopted Son of Tiberius
Died 19 A.D.
Caligula 
Emperor 
37 - 41 A.D.
Claudius Emperor  41 - 54 A.D.
Britannicus Son of Claudius Died 55 A.D.
Nero 
Emperor
54 - 68 A.D.
Clodius Macer  Rebel against Galba 68 A.D.
Galba  Emperor  68 - 69 A.D.
Otho  Emperor  69 A.D.
Vitellius Emperor 69 A.D.
Vespasian  Emperor 69 - 79 A.D.
Titus  Emperor 79 - 81 A.D.
Domitian  Emperor  81 - 96 A.D.
Nerva  Emperor  96 - 98 A.D.
Trajan Emperor 98 - 117 A.D.
Hadrian  Emperor 117 - 138 A.D.
Aelius  Caesar  136 - 138 A.D.
Antoninus Pius  Emperor  138 - 161 A.D.
Marcus Aurelius Emperor 161 - 180 A.D.
Lucius Verus Emperor 161 - 169 A.D.
Commodus  Emperor  180 - 192 A.D.
Pertinax Emperor  193 A.D.
Didius Julianus Emperor  193 A.D.
Clodius Albinus  Caesar/Contender For the Throne 195 - 197 A.D.
Pescennius Niger Caesar 193 - 194 A.D.
Septimius Severus  Emperor  193 - 211 A.D.
Geta 
Emperor
211 - 212 A.D.
Caracalla Emperor  211 - 217 A.D.
Macrinus  Emperor  217 - 218 A.D.
Elagabalus  Emperor  218 - 222 A.D.
Severus Alexander Emperor  222 - 235 A.D.
Maximinus I Emperor 235 - 238 A.D.
Gordianus I - Africanus Emperor  238 A.D. 
Gordianus II - Africanus Emperor  238 A.D. 
Balbinus and Pupienus Emperors  238 A.D. 
Gordianus III  Emperor 238 - 244 A.D. 
Philip I  - The Arab Emperor 244 - 249 A.D.
Philip II Emperor 247 - 249 A.D.
Pacatian and Jotapian Usurpers 248 A.D.
Trajan Decius Emperor 249 - 251 A.D.
Herennius Etruscus Emperor 251 A.D.
Hostilian Emperor 251 A.D.
Trebonianus Gallus  Emperor 251 - 253 A.D.
Volusianus Emperor 251 - 253 A.D.
Aemilianus  Emperor 253 A.D.
Uranius Antoninus Usurper in Emesa  253 - 254 A.D.
Valerian I  Emperor 253 - 260 A.D.
Valerian II Caesar 253 - 255 A.D.
Gallienus Emperor 253 - 268 A.D.
Saloninus Emperor 259 A.D.
Macrianus Usurper in the East 260 - 261 A.D.
Quietus Usurper in the East 260 - 261 A.D.
Postumus Rebel Emperor in Gaul  259 - 268 A.D.
Laelianus  Rebel Emperor in Gaul  268 A.D.
Marius  Rebel Emperor in Gaul  268 A.D.
Victorinus Rebel Emperor in Gaul  268 - 270 A.D.
Tetricus I  Rebel Emperor in Gaul  270 - 273 A.D.
Tetricus II Rebel Emperor in Gaul  270 - 273 A.D.
Claudius Gothicus II Emperor 268 - 270 A.D.
Quintillius  Emperor 270 A.D.
Aurelianus Emperor 270 - 275 A.D.
Valabathus Dux Romanorum Ruler of Palmyra 271 - 272 A.D.
Tacitus  Emperor 275 - 276 A.D.
Florianus Emperor 276 A.D.
Probus  Emperor 276 - 282 A.D.
Carus Emperor  282 - 283 A.D.
Carinus  Emperor  283 - 285 A.D.
Numerianus Emperor  283 - 284 A.D.
Carausius  Rebel Emperor in Britain 287 - 293 A.D.
Allectus Emperor  293 - 296 A.D.
Diocletian  Emperor  284 - 305 A.D.
Maximianus Emperor  286 - 305 + 306 - 308 A.D.
Galerius Emperor 305 - 311 A.D.
Constantius I (Chlorus)  Emperor 305 - 306 A.D.
Severus II Emperor  306 - 307 A.D.
Maximinus
Emperor  309 - 313 A.D.
Constantine I (The Great) Emperor  306 - 337 A.D.
Maxentius Emperor 306 - 312 A.D.
Romulus  Caesar Died - 309 A.D.
Licinius I Emperor 308 - 324 A.D.
Licinius II Caesar 317 - 324 A.D.
Crispus Caesar  317 - 326 A.D.
Delmatius  Caesar 335 - 337 A.D.
Hanniballinus 
Rex
335 - 337 A.D.
Constantine II Emperor 337 - 340 A.D.
Constans Emperor 337 - 350 A.D.
Constantius II Emperor  337 - 361 A.D.
Constantius Gallus  Caesar 351 - 354 A.D.
Magnentius  Emperor  350 - 353 A.D.
Decentius  Caesar 351 - 353 A.D.
Vetranio Loyal Usurper 350 A.D.
Julian II (The Apostate)  Emperor 361 - 363 A.D.
Jovian  Emperor  363 - 364 A.D.
Valentinian I Emperor 364 - 375 A.D.
Valens 
Emperor
364 - 378 A.D.
Procopius  Usurper  365 - 366 A.D.
Gratian Emperor  367 - 383 A.D.
Valentinian Emperor  375 - 392 A.D.
Eugenius Emperor  394 A.D.
Magnus Maximus Emperor 383 - 388 A.D.
Theodosius I (The Great)  Emperor 379 - 395 A.D.
Honorius Emperor 395 - 423 A.D.
Arcadius Emperor 395 - 408 A.D.
Constantine III Emperor 407 - 411 A.D.
Constans II  Emperor 408 - 411 A.D.
Constantius III Emperor 411 A.D.
Priscus Attalus  Puppet Emperor 409 - 410 & 414 - 415A.D.
Johannes Usurper 423 - 425 A.D.
Theodosius II Emperor 402 - 450 A.D.
Valentinian III  Emperor 425 - 455 A.D.
Marcian Emperor 450 - 457 A.D.
Petronius Maximus  Emperor 455 A.D
Avitus  Emperor 456 - 457 A.D.
Leo I  Emperor 457 - 474 A.D.
Majorian Emperor 457 - 461 A.D.
Minor 5th Century Western Emperors 461 - 480 A.D.
Romulus Augustus  Emperor 475 - 476 A.D.
Zeno  Emperor  474 - 491 A.D.
Anastasius  Emperor  491 - 518 A.D.
Justin I  Emperor  518 - 527 A.D.
Justinian 
Emperor
527  - 565 A.D.