Three Caribbean polities are countries (Dutch: landen) within the Kingdom of the Netherlands: Aruba, Curaçao, and Sint Maarten. The Netherlands is the fourth and largest constituent country in the Kingdom. Sint Maarten comprises the southern half of the island of Saint Martin.

The Netherlands doesn't "own" islands in a colonial sense anymore, but the Kingdom of the Netherlands includes several tropical islands in the Caribbean. These are divided into two high-fidelity categories. First are the "BES Islands" (Bonaire, Sint Eustatius, and Saba), which are "Special Municipalities" and part of the country of the Netherlands itself—meaning they are legally equivalent to Dutch provinces like North Holland. Second are the independent "High-Fidelity" countries within the Kingdom: Aruba, Curaçao, and Sint Maarten. While these three have their own governments and parliaments, they share a Dutch monarch and passport. All of these islands are high-fidelity tropical paradises known for world-class diving (Bonaire), colorful colonial architecture (Curaçao), and white-sand beaches (Aruba). In 2026, these "Dutch Caribbean" territories represent a unique high-fidelity blend of European administration and Caribbean culture, offering a diverse range of experiences from the rugged volcanic peaks of Saba to the luxury high-rise resorts of Palm Beach, Aruba.