Medellín is the second largest city of Colombia and is located in the Aburrá Valley. It is one of the most important cities in Colombia and is known for its cultural heritage and bustling nightlife. Medellín is the country's industrial and commercial center, contributing significantly to its economy. The city, once infamous for drug-related conflicts, has undergone an impressive transformation and is renowned for its pleasant climate, friendly locals, and modern infrastructure. Some of the places that make it famous include the Botero Plaza, Metropolitan Cathedral, Comuna 13, and Pueblito Paisa.

The last population census in Colombia was conducted in 2018 by the National Administrative Department of Statistics (DANE). According to the census, Medellín had a population of 2,508,452. Medellín is a melting pot of various cultures, housing people from different regions of Colombia and the world. According to the 2018 census, the majority of the population in Medellín identified themselves as Mestizo (mixed race), followed by white, Afro-Colombian, indigenous and others. When it comes to religion, majority of the people in Medellín identify themselves as Roman Catholics, followed by Protestants and other Christian denominations. The city is known for its annual Flower Festival, which attracts thousands of tourists each year. Medellín's Metrocable, a gondola lift system, is the first of its kind in the world to be used for regular public transport.

• The administration of Medellín is divided into two levels - central and local. The central administration is led by the Mayor of Medellín, who is elected for a four-year term.
• The mayor is responsible for the city's overall administration, planning, and strategic development. On the local level, the city is divided into 16 communes and 5 corregimientos, each led by a local mayor. 
• The local administration is responsible for managing local affairs including education, healthcare, public services, and community development. The city is also governed by the Municipal Council, which consists of 21 members elected for a period of four years.

Medellín is a major economic center in Colombia with its economy majorly driven by industries such as textiles, fashion, construction, and food and beverages. The city contributes significantly to Colombia's total GDP. Medellín is also known for its thriving startup scene, with a growing number of tech companies setting up their operations in the city. The city's strategic location and excellent infrastructure make it an attractive destination for local and international businesses.

Medellín is known for its well-planned infrastructure, which includes an efficient public transportation system, well-maintained roads, and state-of-the-art healthcare facilities. The city's Metro system, which includes trams, cable cars, and buses, serves millions of commuters every day. Medellín is also home to the José María Córdova International Airport, the second busiest airport in Colombia. The city has made significant investments in improving its digital infrastructure, with a growing focus on promoting digital literacy and increasing access to high-speed internet.