| Department of Nariño | |
| Native Name: | Departamento de Nariño |
| Native Name Lang: | es |
| Type: | Department |
| Image Map1: | Narino Topographic 2.png |
| Map Caption1: | Topography of the department |
| Motto: | Desde el mar hasta el Galeras (Spanish: From the sea to the Galeras) |
| Anthem: | Himno del Departamento de Nariño |
| Coordinates: | 1.1667°N -93°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Colombia |
| Subdivision Type1: | Region |
| Subdivision Name1: | Pacific Region/Andes Region |
| Parts Type: | Largest city |
| Parts Style: | para |
| Established Title: | Established |
| Established Date: | 6 August 1904 |
| Blank Name Sec1: | Provinces |
| Blank Info Sec1: | 3 |
| Blank1 Name Sec1: | Municipalities |
| Blank1 Info Sec1: | 64 |
| Seat Type: | Capital |
| Seat: | Pasto |
| Leader Title: | Governor |
| Leader Name: | John Rojas (2020-2023) |
| Unit Pref: | Metric |
| Area Total Km2: | 33268 |
| Area Rank: | 11th |
| Population Footnotes: | [1] |
| Population Total: | 1,630,592 |
| Population As Of: | 2018 |
| Population Rank: | 8th |
| Population Density Km2: | auto |
| Demographics Type1: | GDP |
| Demographics1 Title1: | Total |
| Demographics1 Info1: | COP 21,775 billion (US$ 5.1 billion) |
| Timezone1: | UTC-05 |
| Iso Code: | CO-NAR |
| Blank Name Sec2: | HDI (2019) |
| Blank Info Sec2: | 0.724[2] · 24th of 33 |
| Website: | [Gobernación http://xn--nario-rta.gov.co/inicio/] |
Nariño (pronounced as /es/) is a department of Colombia named after independence leader Antonio Nariño. Its capital is Pasto. 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. Other important cities include Tumaco and Ipiales.
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.
Juan de Ampudia and Pedro de Añazco first explored the mountainous part of the department, commissioned by Sebastián de Belalcázar in 1535, who then toured the territory in 1536 and reached Popayán and remained for some time before leaving for Spain.