Saint-Barthélemy Population: The population of Saint Barthelemy is 9, 035. GDP: $ 191 million (1999) Climate: St. Barts has a tropical climate. People: white, Creole (mulatto), black, Guadeloupe Mestizo (French-East Asia) Religion: Roman Catholic, Protestant, Jehovah’s Witnesses. Capital: Gustavia, Saint Barthelemy is the capital. Language: French is the official language of St. Barthélemy. Currency: The Euro is the local currency on St. Barth. Time Zone: UTC-04:00 Destination World Map Recent Posts When Your Birthday Falls on a Friday Should School Re-open during a Pandemic? Implementing a Flexible-Work-Schedule Post COVID19 What Matters Most We Are Given 24 Hours Each Day