The United States ambassador to Saint Lucia is the official representative of the government of the United States to the government of Saint Lucia. The ambassador is the United States Ambassador to Barbados and the Eastern Caribbean, resident in Bridgetown, Barbados, and is concurrently the ambassador to Antigua and Barbuda, Barbados, Dominica, Grenada, St. Kitts and Nevis, and St. Vincent and the Grenadines.
No U.S. mission has ever been established at Castries. All diplomatic functions are handled out of the U.S. Embassy at Bridgetown, Barbados, where the U.S. Ambassador to Saint Lucia is resident.
The following is a list of U.S. ambassadors, or other chiefs of mission, to Saint Lucia. The title given by the United States State Department to this position is currently Ambassador Extraordinary and Plenipotentiary.