Which island is shared by the countries of Saint Martin and Sint Maarten?

Saint Martin is the Caribbean island shared by Saint Martin and Sint Maarten.

The northern part of the island is the French overseas collectivity of Saint Martin, while the southern part is Sint Maarten, a constituent country of the Kingdom of the Netherlands. The political division dates from the Treaty of Concordia, signed in 1648, and the border is one of the world’s notable open international boundaries.

The island is often called the smallest inhabited island divided between two nations, although wording about its exact status varies depending on whether political or geographic measurements are used. Philipsburg is the capital of Sint Maarten, and Marigot is the main town of the French side.

Saint Barthélemy and Anguilla are nearby islands, but neither is divided in this way. The island’s dual identity is reflected in its French, Dutch, Caribbean, and international influences.