List of state leaders in 300

299 state leaders - Events of AD 300 - AD 301 state leaders - State leaders by year-----

Africa

*Axum – Ella Amida, King of Axum (?-c.320)
*Kush
**Yesbokheamani, King of Kush (283-300)
**(Unknown Queen), Queen of Kush (300-308)

Asia

*Armenia - Tiridates III, King of Armenia (283-330)
*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)
*Kushan Empire – Vasudeva II, Emperor of the Kushans (c.290-310)
*Western Kshatrapas - Vishwasen, King of the Western Kshatrapas (294-304)

Europe

*Ireland - Fiacha Sraibhtine, High King of Ireland (285-322)
*Western Roman Empire (Tetrarchy)
**Marcus Aurelius Valerius Maximianus, Western Augustus (286-305)
**Gaius Flavius Valerius Constantius, Western Caesar/Consul (293-306)

Middle East

*Eastern Roman Empire (Tetrarchy)
**Gaius Aurelius Valerius Diocletianus, Eastern Augustus (284-305)
**Gaius Galerius Valerius Maximianus, Eastern Caesar/Consul (293-311)
*Persia (Sassanid Dynasty) - Narseh, Great King of Persia (293-302)