Who are the Colombian millennials presents the results of an investigation that aimed to get to know this generation, made up of those born between 1981 and 2000. There are many foreign references and information received on the behavior and profile of the members of that generation. generation, but there is no source of its own that comes close to characterizing the millennial of our country. This was the reason for carrying out the study, which had the participation of eleven Colombian companies from different economic sectors in Bogotá, Medellín, Cali, Barranquilla and Bucaramanga, and which shows that in Colombia there are four types of millennials and that at age it is not the only criterion that allows them to be identified.