Atlántico (Spanish pronunciation: [aðˈlantiko], English: Atlantic) is a department of Colombia, located in northern Colombia with the Caribbean Sea to its north, the Bolívar Department to its west and south separated by the Canal del Dique, and the Magdalena Department to its east separated by the Magdalena River.

The department's capital and most-populous city is Barranquilla with a population of 1,327,209.

Soledad and Malambo are also significant population centers within Atlántico, constituting integral parts of the Barranquilla metropolitan area.

The University of Atlántico, with 22,790 students in 2021, stands as the largest higher education institution by student population in the department.

Amazonas Antioquia Arauca Atlántico Bolívar Boyacá Caldas Caquetá Casanare Cauca Cesar Chocó Córdoba Cundinamarca Guainía Guaviare Huila La Guajira Magdalena Meta Nariño N. Santander Putumayo Quindío Risaralda San Andrés Santander Sucre Tolima Valle del Cauca Vaupés Vichada