List of state leaders in 138

This is a list of heads of state, heads of governments, and other rulers in the year 138.

Africa

• Kush – Adeqetali, King of Kush (134–140)

Asia

• China – Shun, Emperor of China (125–144)
• Korea (Three Kingdoms Period)
  • Baekje – Gaeru, King of Baekje (128–166)
  • Goguryeo – Taejo, King of Goguryeo (53–146)
  • Silla – Ilseong, King of Silla (134–154)

Europe

• Athens – Praxagoras Thoricius, Archon of Athens (138–139)
• Bosporan Kingdom – Tiberius Julius Rhoemetalces, Roman client King of Bosporus (132–153)
• Caucasian Iberia – Pharasmanes II, King of Caucasian Iberia (116–142)
• Ireland – Conn of the Hundred Battles, High King of Ireland (122–157)
• Roman Empire (Principate – Nervan-Antonian dynasty)
  • Hadrian, Roman Emperor (117–138)
  • Antoninus Pius, Roman Emperor (138–161)
  • Kanus Iunius Niger, Consul (138)
  • Gaius Pomponius Camerinus, Consul (138)
  • Marcus Vindius Verus, Consul suffectus (138)
  • Publius Pactumeius Clemens, Consul suffectus (138)
  • Publius Cassius Secudus, Consul suffectus (138)
  • Marcus Nonius Mucianus, Consul suffectus (138)
  • Marcus Gavius Maximus, Praetorian prefect (136–156)
  • Roman Britain (Britannia Province) – Quintus Lollius Urbicus, Roman governor (138–144)
  • Ægyptus Province – Gaius Avidius Heliodorus, Roman Prefect (137–142)
  • Syria Palaestina Province – Interregnum in Nasi of the Sanhedrin (120–142)
• Ulaid – Tipraiti Tireach, King of the Ulaid (136–187)

Middle East

• Characene – Meredates, King of Characene (131–151)
• Osroene – Ma'nu VII, King of Osroene (123–139)
• Parthian Empire
  • Vologases III, Great King (Shah) of Parthia (105–147) also known as Vologases I (Vagharsh I) of Arsacid Armenia (119-144)
  • Mithridates IV, Great King (Shah) of Parthia (129–140)