Atletico Tucuman is a professional football club based in the city of San Miguel de Tucuman, Argentina. The club was founded on September 27, 1902, and it's one of the first social and sports clubs in the north of the country. It has a historical rivalry with San Martin de Tucuman.

In the first years of foundation, the institution was not known by "The Dean" nickname, but rather had nicknames with a more social connotation at that time. For this reason, the supporters of Atletico were first considered as "ojitos verdes" or "pitucos". This was due to the location of their stadium and the social level they had, which was much higher than that of the fans of their lifelong rivals from San Martin, who were known as "greengrocers" or "surgeons", due to their proximity to the market (Mercado de Abasto).

The "Dean" nickname was given many years later, due to since when it was baptized, Atletico had been the first soccer club founded in the Argentine North and one of the pioneers of the entire country. That is, the C.A.T. was the dean for the years that he had been spreading his football through the Argentine fields.

Atletico Tucuman was the first team in all of Argentina to wear a jersey with vertical white and light blue stripes. It's also worth noting, that the design of the shirt and the colors of the club weren't changed throughout all of history.

One of the club's most notable players is Luis Miguel Rodriguez, also known as "Pulga" Rodriguez, who played for the team for several years and helped to lead Atletico Tucuman to historic achievements, including promotion to the Primera Division and a Copa Argentina title in 2017.

Atletico Tucuman barra brava, known as La Inimitable, is dominated by two families who are actually blood relatives: the González and the Acevedo. Both families have many political connections and once managed to hang the La Inimitable flag from the balcony of the government house in Tucuman.

La Hinchada de Velez Sarsfield is called "The Liniers Gang" since the club is located in the Liniers neighborhood. They are also nicknamed "Fortineros" since their stadium is called "El Fortin". It had approximately 56,000 socios (members) for Feb 2023. It's one of the 8 Argentine teams that have a Copa Libertadores and it's the 6th club in the country by the number of supporters. It has clásico with Club Atlético Ferrocarril del Oeste, although this rivalry lost popularity since this club has been in the 2nd division for more than 10 years.

Velez Sarsfield 1:1 Atlético Tucumán