Colombia is the South American country that borders both the Atlantic and Pacific oceans. Its Caribbean coastline is part of the Atlantic Ocean system, while its western coast faces the Pacific.
Colombia occupies the continent’s northwestern corner. The Caribbean coast includes major ports such as Cartagena and Barranquilla, while the Pacific coast is centred in the Chocó region and includes the port of Buenaventura. Colombia’s Pacific shoreline is separated from its Caribbean coast by the Darién region and the Isthmus of Panama.
The wording can cause a common mix-up: Colombia’s Atlantic-facing coast is usually described geographically as the Caribbean coast, not as a coast directly labelled “Atlantic.” The Caribbean Sea is a marginal sea of the Atlantic Ocean, so Colombia satisfies the question’s intended geographic distinction.
Chile also reaches the Pacific, but it has no Atlantic coastline. Venezuela has a Caribbean coast but no Pacific coast, and Ecuador faces only the Pacific. Colombia’s two-ocean position has shaped its trade, climate, biodiversity and strategic importance.