Founded on 4 August 1800 by Mr. José Joaquín Ruiz y Zapata, villager judge from the city ofArma de Rionegro, with seventy-seven people. Initially it was called San José de Ezpeleta de Sonsón in honor of the patron San José and the viceroy Ezpeleta. During the firsts decades of the 19th century, Sonsón became in the provider center of the colonization towards the Colombian west, being a very important financial and commercial hub in the Antioquian region, and also being for several years the second city of the Department. The Municipality of Sonsón is located in the southeastern Antioquia, with 1,323 km², it occupies the 15th place in territory of the Department. It has all the climates from the paramo, until the warm weather in the Magdalena Medio. 105 veredas distributed in its 8 corregimientos which makes it diverse in crops, landscapes and culture. Its economy is based in production of potato, corn, tomato, coffee, fig, milk, forge. In the zone of Magdalena Medio there is one cement plant and there's mining of marble in the corregimiento of La Danta.
Economy
Sonsón's economy is largely dependent on agriculture. As agriculture played a vital role in Sonsón, many individuals migrated to the Caribbean and other islands during the slave trade to support economic growth. These individuals are well versed in farming, art, business, and politics. http://www.personal.psu.edu/jml34/spcreole.pdf
Roads
Sonsón is connected to Medellín by a road. It is also connected to the municipalities of Abejorral, La Unión and Aguadas This locality was also knew by the development of the old Medellin - Bogotá motorway. Actually it's being paved to La Dorada
Climate
The climate in the urban area of Sonsón is usually cold, with an average temperature of 14 °C ; but its 1,323 km² makes it diverse, because this is one of the few towns in Colombia with all the climates. Some townships as Alto de Sabanas or Los Medios have an average temperature of 24 °C ; the zone of Rioverdes have an average temperature of 27 °C and the zone of Sonsonian Magdalena Medio has an average temperature of 30 °C. Anyway, all the nights of the Sonsón's urban area has an average temperature of 11 °C. Sonsón has a clean air with very little pollution
Museums
Sonsón is the town with more museums in Colombia. Some of them are: