List of state leaders in 306

This is a list of heads of state, government leaders, and other rulers in the year 306.

Asia

• Armenia - Tiridates III, King of Armenia (287–330)
• China (Western Jin Dynasty)
  • Emperor Hui, Emperor of China (290 - 307)
• 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)

Europe

• Western Roman Empire
  • Constantius Chlorus, Western Roman Emperor (305–306)
  • Severus, Roman Emperor in Milan (306–307)
  • Constantine I, Roman Emperor in Britain (306–337)
  • Maxentius, Roman Emperor in Rome (306–312)

Middle East

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