List of state leaders in 40

This is a list of heads of state, government leaders, and other rulers in the year 40.

Africa

• Kush –
  1. Pisakar, King of Kush (c.30–40)
  2. Amanitaraqide, King of Kush (c.40–50)
• Mauretania – Ptolemy, King of Mauretania (23–40) (Mauritania then annexed to Rome)

Asia

• China – Guangwu, Emperor of China (25–57)
• Japan (Legendary Emperors) – Suinin, Emperor of Japan (29 BC–AD 70)
• Korea (Three Kingdoms Period)
  • Baekje – Daru, King of Baekje (28–77)
  • Goguryeo – Daemusin, King of Goguryeo (18–44)
  • Silla – Yuri, King of Silla (24–57)
• Kushan Empire – Kujula Kadphises, King of Kush (30–80)

Europe

• Athens – Secoundus, Archon of Athens (39–40)
• Atrebates – Verica, King of the Atrebates (15–40)
• Bosporan Kingdom – Tiberius Julius Mithridates, Roman client King of Bosporus (38–46)
• Cantiaci – Adminius, King of the Cantiaci (30–40)
• Catuvellauni
  • Cunobelinus, King of the Britons and King of the Catuvellauni (9–40)
  • Togodumnus, King of the Catuvellauni (40–43)
• Caucasian Iberia – Mithridates, King of Caucasian Iberia (30–50)
• Ireland – Fíachu Finnolach, High King of Ireland (39–56)
• Odrysian kingdom
  • Rhoemetalces III, Odrysian King of Thrace (38–46)
  • Pythodoris II, Odrysian Queen of Thrace (38–46)
• Roman Empire (Principate – Julio-Claudian dynasty)
  • Caligula, Roman Emperor (37–41)
  • Caligula, Consul (40)
  • Gaius Laecanius Bassus, Consul suffectus (40)
  • Quintus Terentius Culleo, Consul suffectus (40)
  • Marcus Arrecinus Clemens, Praetorian prefect (38–41)
  • Lucius Arruntius Stella, Praetorian prefect (38–41)
  • Judea (Iudaea Province)
    • Marullus, Roman Prefect (37–41)
    • Agrippa I, Tetrarch of Batanaea (37–41)
    • Agrippa I, Tetrarch of Galilee (40–41)
    • Gamaliel, Nasi of the Sanhedrin (30–50)
    • Theophilus ben Ananus, High Priest of Judea (37–41)
  • Syria Province – Publius Petronius, Roman Prefect (39–42)

Middle East

• Adiabene
  • Helena, Queen of Adiabene (30–58)
  • Izates bar Monobaz, King of Adiabene (34–55)
• Armenia – Orodes, King of Armenia (Parthian protectorate) (35, 37–42)
• Characene – Attambalos III, King of Characene (37–45)
• Commagene – Interregnum – Roman rule (38–41)
• Nabatea
  • Aretas IV Philopatris, King of Nabatea (9 BC–40 AD)
  • Malichus II, King of Nabatea (40–70)
• Osroene – Abgar V of Edessa, King of Osroene (4 BC–7 AD, 13–50)
• Parthian Empire
  • Interregnum (38–40)
  • Vardanes I, Great King (Shah) of Parthia (40–47)
  • Gotarzes II, Great King (Shah) of Parthia (40–51)
• Pontus – Polemon II, King of Pontus (38–64)