List of state leaders in 305

304 state leaders - Events of AD 305 - AD 306 state leaders - State leaders by year

Asia

• Armenia - Tiridates III, King of Armenia (283–344)
• China (Western Jin Dynasty) - Emperor Hui, Emperor of China (290–307)
• Gupta Empire – Ghatotkacha, Gupta Emperor of India (280–319)
• Japan (Ancient period) - Emperor Ōjin, emperor of Japan (c.270-c.310)
• Korea (Three Kingdoms Period)
  • Baekje - Biryu, King of Baekje (304–344)
  • Goguryeo - Micheon, King of Goguryeo (300–331)
  • Silla - Girim, King of Silla (298–310)
• Kushan Empire – Vasudeva II, Emperor of the Kushans (c.290–310)
• Western Kshatrapas - Rudrasena IV, King of the Western Kshatrapas (304-?)

Europe

• Western Roman Empire
  • Maximian, Western Roman Emperor (286–305)
  • Constantius Chlorus, Western Roman Emperor (305–306)

Middle East

• Eastern Roman Empire
  • Diocletian, Eastern Roman Emperor (286–305)
  • Galerius, Eastern Roman Emperor (305–311)
• Persia (Sassanid Dynasty)
  • Hormizd II, Great King of Persia (302 - 309)