| Department of Atlántico | |
| Native Name: | Departamento del Atlántico |
| Native Name Lang: | es |
| Type: | Department |
| Image Map1: | Atlantico Topographic 2.png |
| Map Caption1: | Topography of the department |
| Motto: | Compromiso para una vida digna (English: Commitment for a worthy life) |
| Anthem: | Himno del Atlántico |
| Subdivision Type: | Country |
| Subdivision Name: |  Colombia |
| Subdivision Type1: | Region |
| Subdivision Name1: | Caribbean Region |
| Parts Type: | Largest city |
| Parts Style: | para |
| Established Title: | Established |
| Established Date: | 1910 |
| Blank Name Sec1: | Provinces |
| Blank1 Name Sec1: | Municipalities |
| Blank1 Info Sec1: | 23 |
| Seat Type: | Capital |
| Seat: | Barranquilla |
| Leader Title: | Governor |
| Leader Name: | Elsa Noguera 2020–2023 (Radical Change) |
| Unit Pref: | Metric |
| Area Total Km2: | 3388 |
| Area Rank: | 30th |
| Population Footnotes: | [1] |
| Population Total: | 2,535,517 |
| Population As Of: | 2018 |
| Population Rank: | 5th |
| Population Density Km2: | auto |
| Demographics Type1: | GDP |
| Demographics1 Title1: | Total |
| Demographics1 Info1: | COP 63,765 billion (US$ 15.0 billion) |
| Blank Name Sec2: | HDI (2019) |
| Blank Info Sec2: | 0.786[2] · 4th of 33 |
| Timezone1: | UTC-05 |
| Iso Code: | CO-ATL |
Atlántico (pronounced as /es/, 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. Despite being the third smallest in the country, the department is among the most densely populated, with a population of 2,535,517.
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.
See main article: Governor of Atlántico.
The University of Atlántico, with 22,790 students in 2021, stands as the largest higher education institution by student population in the department.
In September 2023, the University of the Coast was ranked second among the top universities in the country, while the University of the North ranked fifteenth.
See also: Barranquilla.