The Guianas, sometimes called by the Spanish loan-word Guayanas (Las Guayanas), are a region in north-eastern South America which includes the following three territories:
- French Guiana – an overseas department and region of France.
- Guyana – formerly known as British Guiana from 1831 until 1966, after the colonies of Berbice, Essequibo, and Demerara, taken from the Netherlands in 1814, were merged into a single colony.
- Suriname – formerly Dutch Guiana, until 1814 together with Berbice, Essequibo and Demerara.
In the wider context, the Guianas also includes the following two territories:
- Guayana Region in eastern Venezuela (Amazonas, Bolívar, and Delta Amacuro states), formerly the Guayana Province, alternatively known as Spanish Guayana.
- State of Amapá in northern Brazil, known as Portuguese Guiana (or Brazilian Guiana).