It is in the west of the country, bordering Ecuador and the Pacific Ocean.

Nariño has a diverse geography and varied climate according to altitude: hot in the plains of the Pacific and cold in the mountains, where most of the population resides, a situation that is repeated in a north-south direction.

The territory was occupied during the Pre-Columbian era by numerous Indian tribes, including Quillacingas, Awá, Pasto, and Tumas.

The first European conquistador who entered the territory was Andagoya Pascual in 1522, who traveled from the Colombian Pacific coast and then used information obtained by Francisco Pizarro to organize the expedition that culminated in the conquest of Peru.

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