List of state leaders in 400

This is a list of heads of state, government leaders, and other rulers in the year 400.

Africa

• Axum – Eon, King of Axum

Asia

• China (Sixteen Kingdoms)
  • Eastern Jin - Emperor An, Emperor of Eastern Jin (397-402)
  • Later Liang
    • Lü Guang, Emperor of Later Liang (386-400)
    • Lü Shao, Emperor of Later Liang (400)
    • Lü Zuan, Emperor of Later Liang (400-401)
  • Later Qin - Yao Xing, Emperor of Later Qin (394-416)
  • Later Yan - Murong Sheng, Emperor of Later Yan (398-401)
  • Northern Liang - Duan Ye, Prince of Northern Liang (397-401)
  • Northern Wei - Emperor Daowu, Emperor of Northern Wei (386-409)
  • Southern Liang
    • Tufa Wugu, Prince of Southern Liang (397-399)
    • Tufa Lilugu, Prince of Southern Liang (399-402)
  • Western Liang - Li Gao, Prince of Western Liang (400-417)
  • Western Qin - Qifu Gangui, Prince of Western Qin (388-400)
  • Southern Yan - Murong De. Prince of Southern Yan (398-405)
• Gupta Empire – Chandragupta II, Gupta Emperor of India (375-414)
• Japan (Kofun period) - Emperor Richū, Emperor of Japan (c.400-c.405)
• Korea (Three Kingdoms Period)
  • Baekje - Asin, King of Baekje (392-405)
  • Gaya - Isipum, King of Gaya (346-407)
  • Goguryeo - Gwanggaeto, King of Goguryeo (391-413)
  • Silla - Naemul, King of Silla (356-402)

Europe

• Armenia - Vramshapuh, King of Armenia (389-417)
• Georgia (Caucasian Iberia) - Trdat, King of Iberia (394-406)
• Ireland - Niall Noigíallach, High King of Ireland (378-405)
• Visigoths - Alaric I, King of the Visigoths (395-410)
• Western Roman Empire
  • Honorius, Western Roman Emperor (395-423)
  • Stilicho, Magister militum (395-408)

Middle East

• Eastern Roman Empire - Arcadius, Eastern Roman Emperor (395-408)
• Persia (Sassanid Dynasty) - Yazdegerd I, Great King of Persia (399-420)