The Commonwealth of Dominica is an island nation in the Caribbean Sea. It is an English-speaking country. It is between the French-speaking territories of Guadeloupe and Martinique. The island is 751 km² (290 mi²) in area. Roseau is its capital. Portsmouth is another main town. Almost 70,000 people live on the island.

The currency of the island is the East Caribbean dollar.

The island's name comes from the Latin for Sunday, Dies Dominica. It is not the Spanish-speaking Dominican Republic in the Greater Antilles.

The country is nicknamed the Nature Island of the Caribbean.

Dominica is most famously depicted in Jean Rhys' classic prequel to Jane Eyre, Wide Sargasso Sea.