European Union has several member states that have a significant number of islands.
List of islands of Bulgaria
List of islands of Cyprus
List of islands of Denmark
List of islands of Estonia
List of islands of Finland
List of islands of France
List of islands of Germany
List of islands of Greece
List of islands of Hungary
List of islands of Ireland
List of islands of Italy
List of islands of Latvia
List of islands of Lithuania
List of islands of Malta
List of islands of the Netherlands
List of islands of Poland
List of islands of Portugal
List of islands of Romania
List of islands of Slovakia
List of islands of Slovenia
List of islands of Spain
List of islands of Sweden
List of islands of the United Kingdom