The Duchy of Estonia may refer to:
- Duchy of Estonia (1219–1346) – Hertugdømmet Estland, a Dominum directum of King of Denmark
- Duchy of Estonia (1561–1721) – Hertigdömet Estland, a dominion of the Kingdom of Sweden
- Duchy of Estonia (1721–1917) or Governorate of Estonia – Эстляндская губерния, Estlyandskaya guberniya, a viceroyalty of the Russian Empire
This disambiguation page lists articles associated with the title Duchy of Estonia.
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