Which island is shared by two countries, France and the Netherlands?

The island shared by France and the Netherlands is Saint Martin. This island is unique as it is divided into two distinct territories: the northern part, known as Saint-Martin, is governed by France, and the southern part, called Sint Maarten, is a constituent country of the Kingdom of the Netherlands. This division creates a blend of French and Dutch culture, cuisine, and governance on the same island.

Saint Thomas, Curaçao, and Dominica are not divided between two countries—Saint Thomas is a U.S. territory, Curaçao is a part of the Kingdom of the Netherlands but not shared with another country, and Dominica is an independent nation. Thus, the division of Saint Martin between France and the Netherlands makes it a notable example of shared sovereignty in the Caribbean.