List of state leaders in 104
AD 103 state leaders – Events of AD 104 – AD 105 state leaders – State leaders by year
Africa
Asia
Europe
- Athens
- Bosporan Kingdom – Tiberius Julius Sauromates I, Roman client King of Bosporus (90–123)
- Caucasian Iberia – Azork, King of Caucasian Iberia (87–106)
- Dacia – Decebalus, King of Dacia (87–106)
- Ireland – Túathal Techtmar, High King of Ireland (76–106)
- Roman Empire (Principate – Nervan-Antonian dynasty)
- Trajan, Roman Emperor (98–117)
- Sextus Attius Suburanus Aemilianus, Consul (104)
- Marcus Asinius Marcellus, Consul (104)
- Tiberius Iulius Candidus Marius Celsus, Consul suffectus (104)
- Gaius Antius Aulus Iulius Quadratus, Consul suffectus (104)
- Gaius Iulius Quadratus Bassus, Consul suffectus (104)
- Gnaeus Afranius Dexter, Consul suffectus (104)
- Quintus Caelius Honotatus, Consul suffectus (104)
- Marcus Vitorius Marcellus, Consul suffectus (104)
- Gaius Caecilius Strabo, Consul suffectus (104)
- Ægyptus Province – Gaius Vibius Maximus, Roman Prefect (103–107)
- Judea (Iudaea Province)
Middle East