The capital city and headquarters of government for the federated state is on the larger island of Saint Kitts.
The smaller state of Nevis lies about 2 miles (3 km) southeast of Saint Kitts, across a shallow channel called "The Narrows".
Historically, the British dependency of Anguilla was also a part of this union, which was then known collectively as Saint Christopher-Nevis-Anguilla.
To the north-northwest lie the islands of Sint Eustatius, Saba, Saint Barthélemy, and Saint-Martin/Sint Maarten.
Saint Kitts and Nevis were amongst the first islands in the Caribbean to be settled by Europeans.