Medellin, officially the Municipality of Medellin, is the second largest and important in Colombia and the capital of the department of Antioquia.  It is located in the Aburrá Valley, a central region of the Andes Mountains in South America. According to the National Administrative Department of Statistic, the city has an estimated population of 2.44 million as of 2014. With its surrounding area that includes nine other cities, the Metropolitan area of Medellin is the second-largest urban agglomeration in Colombia in terms of population and economy, with more than 3.5 million people

The city lies on an altitude of 1,475 meters above sea level, in the Aburrá valley and covers part of the mountains of the central range of the Colombian Andes that surround it. His surface area is approx. 382 km²

The city's average annual temperature is 22 °C (72 °F), and because of its proximity to the equator, its temperature is constant year round, with minimal temperature variations. Temperatures range from 15 to 30 °C (59 to 86 °F). Because of the pleasant spring like climate all year, Medellin is known as "La Ciudad de la Eterna Primavera" or "City of the Eternal Spring". However, as the city is located in a valley and many of its districts are on slopes, temperatures can be slightly cooler on the surrounding mountains.

The city is known as the fashion capital of South America.