Second largest ocean, which separates the Americas from Europe and Africa
Geographical type: Ocean
Area: 106,460,000 km²
- British Isles - Group of islands on the Atlantic Ocean, off the northwest coast of Europe
- Cabo Verde - Islands in the Atlantic Ocean off the coast of west Africa, ruled since 1975 by the República de Cabo Verde
- Cuba - Island in the Caribbean Sea, ruled since 1959 by the República de Cuba
- Dominican Republic - Territory in the island of Hispaniola in the Caribbean Sea, ruled since 1961 by the República Dominicana
- Great Britain - Island territories in western Europe, ruled since 1921 by the Monarchy of the United Kingdom
- Haiti - Territory in the island of Hispaniola in the Caribbean Sea, ruled since 1991 by the République d'Haïti
- Iceland - Island in the north Atlantic Ocean, ruled since 1944 by the Lýðveldið Ísland
- Ireland - Territory in the island of Ireland in the northern Atlantic Ocean, ruled since 1937 by the Poblacht na hÉireann