List of state leaders in 255

254 state leaders – Events of 255 – 256 state leaders – State leaders by year

Africa

• Kush - Tegerideamani II, King of Kush (246-266?)

Asia

• Bactria and Gandhara - Peroz I, Kushanshah (c.250-265)
• Chera - Ilamcheral Irumporai, King of Chera (241-257)
• Gupta Empire - Maharaja Sri-Gupta, King of the Gupta Empire (240-280)
• Iberia - Mithridates II Mihrdat, King of Iberia (249-265)
• Korea (Three Kingdoms Period)
  • Baekje - Goi, King of Baekje (234-286)
  • Gaya Confederacy - Geodeung, King of Gaya (199-259)
  • Goguryeo - Jungcheon, King of Goguryeo (248-270)
  • Silla - Cheomhae, King of Silla (247-261)
• Kushan Empire - Kanishka III, King of the Kushans (255-275)
• Persia - Shapur I of Persia, King of Persia (241-272)
  • Armenia - Artavazde VI, King of Armenia (252-283)
• Shu Han - Liu Shan, Emperor of Shu Han (223-263)
• Tuoba - Tuoba Liwei, Chieftain of the Tuoba clan (219-277)
• Wei - Cao Mao, Emperor of Wei (254-260)
• Wu - Sun Liang, Emperor of Wu (252-258)

Europe

• Roman Empire -
  • Valerian, Roman Emperor in the East (253-260)
  • Gallienus, Roman Emperor in the West (253-268)