The Two Nations theory can refer to:
- Two-Nation Theory, the view that Muslims and Hindus in Colonial India were separate nations
- Two nations theory (Ireland), the view that the Northern Ireland Protestants are a distinct Irish nation
- Deux nations or Two Solitudes (Canadian society), the view that French and English Canada are separate nations
See also
- Austro-Hungarian Compromise of 1867
- Biculturalism
- Binational solution
- Dualism (disambiguation)
- Hyphen War
- Multinational state
- Parallel state
- Taksim (politics)
- Two Chinas
- The two Spains
- Two-state solution (disambiguation)
- Two-state (disambiguation)
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