List of state leaders in 378

This is a list of heads of state, government leaders, and other rulers in the year 378.

Africa

• Ethiopia (Aksumite Empire) - Mehadeyis or Ouazebas (precise dates uncertain)

Asia

• China (Sixteen Kingdoms Period)
  • Eastern Jin Dynasty - Emperor Xiaowu, Emperor of China (372-396)
  • Former Qin - Fú Jiān, Emperor of Former Qin (357-385)
• India
  • Gupta Empire - Chandragupta II (c.350-415)
  • Kadamba Dynasty - Kangavarma (365-390)
  • Kidarite Kingdom - Grumbat (c358-c380)
  • Vakataka - Prithvisena I (355-380)
  • Western Satraps - Rudrasena III (348-380)
• Indonesia (Tarumanagara) - Rajadirajaguru Jayasingawarman (358-382)
• Japan - Nintoku (313-399)
• Korea (Three Kingdoms Period)
  • Baekje - Geungusu, King of Baekje (375-384)
  • Goguryeo - Sosurim, King of Goguryeo (371-384)
  • Silla - Naemul, King of Silla (356-402)
• Sri Lanka - Upatissa I (370-412)

Europe

• Armenia
  1. Varasdates (Varazdat), King of Armenia (374-378)
  2. Arsaces III (Arshak III), King of Armenia (378–387) with Vologases III (Vagharsh III), King of Armenia (378-386)
• Georgia (Caucasian Iberia) - Mihrdat III (c365-380)
• Germany (Thervingi)
  1. Athanaric (died 381)
  2. Fritigern
• Western Roman Empire -
  1. Gratian, Roman Emperor (375-383)
  2. Valentinian II, Roman Emperor (375-392)

Middle East

• Eastern Roman Empire - Valens, Roman Emperor (364-378)
• Persia (Sassanid Empire) - Shapur II (310-379)