Three Kingdoms is an expression for
- Wei, Shu and Wu of China in Chronicles of the Three Kingdoms. See Three Kingdoms of China.
- Koguryo, Paekche and Silla of Korea in Samguk Sagi. See Three Kingdoms of Korea.
- England, Scotland and Ireland in the days before the United Kingdom. For instance, it is found in the works of Jonathan Swift.
- animal, vegetable and mineral in Bahya ibn Paquda's classic work, Duties of the Heart.