List of state leaders in 99
AD 98 state leaders - Events of AD 99 - AD 100 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)
- Aulus Cornelius Palma Frontonianus, Consul (99)
- Quintus Sosius Senecio, Consul (99)
- Sulpicius Lucretius Barba, Consul suffectus (99)
- Senecio Memmius Afer, Consul suffectus (99)
- Quintus Fabius Barbarus Valerius Magnus Iulianus, Consul suffectus (99)
- Aulus Caecilius Faustinus, Consul suffectus (99)
- Quintus Fulvius Gillo Bittius Proculus, Consul suffectus (99)
- Marcus Ostorius Scapula, Consul suffectus (99)
- Tiberius Iulius Ferox, Consul suffectus (99)
- Sextus Attius Suburanus, Praetorian prefect (98–101)
- Roman Britain (Britannia Province) - Tiberius Avidius Quietus, Roman governor (97–101)
- Ægyptus Province - Gaius Pompeius Planta, Roman Prefect (98–100)
- Judea (Iudaea Province)
- Lower Moesia Province - Quintus Pomponius Rufus, Roman governor (c. 99)
Middle East