Bello (Spanish pronunciation: [ˈbeʎo], [ˈbeʝo]) is a city and municipality in Antioquia Department, Colombia and a suburb of Medellín, the department capital. Bello is part of the Metropolitan Area of the Aburrá Valley in the department of Antioquia. It is bordered on the north by the municipality of San Pedro de los Milagros, on the east by the municipality of Copacabana, on the south by the municipality of Medellín and on the west by the municipalities of Medellín and San Jerónimo.

It is the center of the development in the north of the Aburrá Valley (Spanish: Valle de Aburrá), and as a member of the Metropolitan Area of Aburrá Valley, or AMVA (Spanish: Área Metropolitana del Valle de Aburrá), some public services are regulated for the Metropolitan Area. There are several nicknames for the municipality: Imperio del Cacique Niquia (Cacique Niquia's Empire), Cuna de Marco Fidel Suárez ("Marco Fidel Suárez's cradle"), "Ciudad de los artistas" ("Artist's city").

Meaning "Beautiful" in English, Bello was founded in 1676 as "Hato Viejo". The department later changed its name to Bello in honor of Latin American polymath Andrés Bello (1781-1865). Bello was granted municipal status in 1913, officially making it one of the cities of Antioquia Department.

Bello is also known as the "City of Artists" in Colombia. Its current mayor is Lorena Gonzáles Ospina.

In July 1541, troops under the command of Jerónimo Luis Tejelo (Deputy Marshal to Jorge Robledo) found the wide valley of Los Aburrá inhabited by indigenous farmers who had "a habitat organized in groups with scattered houses, forming clusters of houses". This was especially true in the town of Niquías, which occupied the territory now called Bello.

In 1574, the Spanish subject Gaspar de Rodas requested a land grant for the Aburrá Valley from the town hall of Santa Fe de Antioquia in order to establish therein "herds of livestock and agricultural plots", in order to provide food for the conquest. He was awarded the territories from the hill or "Asientos viejos de Aburrá" – an area which is now occupied by the Medellín town center – down, including the Niquía territory. In 1576, the captain of Rodas came to exercise control over the area from the Spanish Crown, permitting the use of the territory for corrals, ranches and flocks. From 1613 onward, the area began to be called Hatoviejo instead of Hato de Rodas or Hato de Aburrá to distinguish it from later herds.

In this context the colonizers exercised their chivalry, understood as "that noble philosophy that reacted against innovations." Thus they endowed their farms with chapels to signify prestige and noble origin and so it can be inferred that in Bello the colony was not given a foundation that "involve a regular pattern of squares and streets. Hatoviejo was not a village as it was in the beginning the town of Candelaria." The chapels that were constructed were Our Lady of Chiquinquirá (in 1653) Our Lady of the Rosary (1720), Our Lady of Sopetrán (in Madera, 1775) and Our Lady of Guadalupe (in Fontidueño, 1761). Later these temples were moved or demolished, as happened with the Hatoviejo Parish Church of Our Lady of the Rosary, demolished in 1788 in order to build the Chapel of Hatoviejo in 1792, which still stands. At the end of the eighteenth century, in 1788, Hatoviejo was elevated to the status of party, assigned to the jurisdiction of the town of Nuestra Señora de la Candelaria in Medellín.

In Hatoviejo the land was organized according to the economic role of its people. The reference to "Calle arriba" (Up the road) and "Calle Abajo," (down the road) was common. The square and the Church of the Rosary were used as the central point. On 28 December 1883 the "Ciudadano Presidente " of the Antioquia State renamed the village from Hatoviejo to Bello, at the request of a group of people who felt that the name "Hato" made them despised and humiliated as hato was a place for animals. Instead, the name Bello was "more cultured, more appropriate and more worthy of the great patriarch of American letters" (Andrés Bello).