Note that in the list below Julius Caesar is not mentioned as an Emperor, while conventionally he is not considered as such. For a more in-depth discussion of whether or not Julius Caesar might have been considered as the first Emperor, see Roman Emperor.
For the worship of the Roman Emperor as a god, see imperial cult.
italics: claimant who cannot be considered to have ruled or held power over part of the empire only bold italics: nickname by which the individual is commonly known
9 June193: Pontifex Maximus; late193: Pater Patriae; 195: Divi Marci Pii filius Divi Commodi Frater; Pius; Arabicus, Adiabenicus; 198: Parthicus Maximus; 209/210: Britannicus Maximus
Co-emperor with Maximian; 285: Germanicus Maximus, Sarmaticus Maximus; 286: Iovius; 287: Germanicus Maximus; 295: Persicus Maximus; 297: Britannicus Maximus, Carpicus Maximus; 298: Armenicus Maximus, Medicus Maximus, Adiabenicus Maximus
Abdicated