List of state leaders in 300 BC

301 BC state leaders — Events of 300 BC — 299 BC state leaders — State leaders by year

Africa

• Carthage — Governing power held by the Council of the Hundred (308 BC–237 BC)
• Egypt (Ptolemaic Dynasty) — Ptolemy I Soter, Pharaoh of Egypt (311 BC–280 BC)

Asia

• China (Warring States Period)
  • Eastern Zhou Dynasty — King Nan of Zhou (314 BC–256 BC)
  • Chu — King Huai of Chu (328 BC–298 BC)
  • Han — King Xiang of Han (311 BC–295 BC)
  • Lu — Duke Ping of Lu (314 BC–295 BC)
  • Qi
    1. King Xuan of Qi (319 BC–300 BC)
    2. King Min of Qi (300 BC–283 BC)
  • Qin — King Zhaoxiang of Qin (306 BC–250 BC)
  • Wei (II) — King Xiang of Wei (318 BC–295 BC)
  • Yan — King Zhao of Yan (311 BC–278 BC)
  • Zhao — King Wuling of Zhao (325 BC–298 BC)
• Mauryan Empire — Chandragupta Maurya, Mauryan Emperor (322 BC–298 BC)

Europe

• Athens — Hegemachus, Archon of Athens (300 BC–299 BC)
• Ireland — Ailill Caisfhiaclach, High King of Ireland (314 BC–289 BC)
• Macedon (Antipatrid Dynasty) — Cassander, King of Macedon (302 BC–297 BC)
• Roman Republic
  • Marcus Valerius Corvus, Consul (301 BC–299 BC)
  • Quintus Appuleius Pansa, Consul (300 BC–299 BC)
• Sparta
  • Archidamus IV, King of Sparta (Eurypontid Dynasty) (305 BC–275 BC)
  • Areus I, King of Sparta (Agiad Dynasty) (309 BC–265 BC)
• Syracuse — Agathocles, Tyrant of Syracuse (317 BC–289 BC)
• Thrace — Lysimachus, King of Thrace (306 BC–281 BC)

Middle East

• Bithynia — Zipoites I, King of Bithynia (328 BC–279 BC)
• Cappadocia — Ariarathes II, King of Cappadocia (301 BC–280 BC)
• Cilicia — Pleistarchus, King of Cilicia (301 BC–?)
• Pontus — Mithridates I Ctistes, King of Pontus (302 BC–266 BC)
• Seleucid Empire — Seleucus I Nicator, Great King of Persia (311 BC–281 BC)