The Lesser Antilles are a group of islands in the Caribbean Sea, forming a volcanic island arc. The Lesser Antilles are grouped into the Leeward Islands in the north, the Windward Islands in the south, and the Leeward Antilles in the west, and Anguilla, Antigua and Barbuda, Aruba, Barbados, Bonaire, the British Virgin Islands, Caribbean Netherlands, Curacao, Dominica, Grenade, Guadeloupe, Martinique, Montserrat, Saint Barthelemy, Saint Kitts and Nevis, Saint Lucia, Saint Martin, Saint Vincent and the Grenadines, Sint Maarten, Trinidad and Tobago, and the US Virgin Islands are counted as island states in the Lesser Antilles region of the Caribbean.