Saint-Marc is a commune located in the Guadeloupe archipelago in the Caribbean. It is situated on the island of Basse-Terre, part of the dual-island structure that comprises the main inhabited territory of this French overseas region.
The commune is one of several municipalities found across Basse-Terre and participates in the broader cultural and administrative systems of Guadeloupe. Like other communes in the region, Saint-Marc reflects the blend of French colonial heritage and Caribbean island culture characteristic of Guadeloupe.