The Organisation of Eastern Caribbean States (OECS), created in 1981, is an inter-governmental organisation dedicated to economic harmonisation and integration, protection of human and legal rights, and the encouragement of good governance between countries and dependencies in the Eastern Caribbean. It also performs the role of spreading responsibility and liability in the event of natural disaster, such as a hurricane.

The main organ of the OECS, the Secretariat, is based in the capital city of Castries, Saint Lucia.