Club Atlético Unión (Spanish pronunciation: [ˈkluβ aˈtletiko wˈnjon]; mostly known as Unión de Santa Fe [uˈnjon de santa ˈfe]) is a sports club from Santa Fe, the capital city of the Santa Fe Province, in Argentina. The club was founded on 15 April 1907.
Unión is mostly known for its football team and currently plays in the Argentine Primera División.
Other sports practised at the club include basketball, futsal, gymnastics, field hockey, swimming, karate, rugby union, roller skating, and volleyball. The basketball team competes in Liga Nacional de Básquet, the top division of basketball in Argentina.
Contents
History
The club was established by a group of fourteen former members of Santa Fe Foot-ball Club, on April 13, 1907 after a meeting held in the Baragiola family on Catamarca street. Guillermo Drenner was appointed as president of the institution. Initially the club was named "Club United" after a proposal from founding member Cayetano Bossi, who alleged that the club should represent the friendship ties of the founders. The name changed to "Unión Foot-Ball Club" in 1907, remaining until 1918 when it was translated to "Club Atlético Unión" in Spanish language.
The first shirt worn was white with black collar. In 1907 a meeting was held with the purpose of choosing the club colors. Some of the models proposed were a red, white and black striped, while other members proposed a white and red striped shirt (inspired on legendary Alumni Athletic Club uniform), which finally won after being voted by the majority.
The first match played by the team was vs a San Carlos Centro on 15 May 1907, won by Unión 4–1. Unión was also a founding member (along with Argentine, Central Santa Fe, Brown, Red Star, Sarmiento, San Justo Football Club y Estudiantes de Comercio) the "Liga Regional Santafesina", where the team won the title four consecutive times. In 1910 the club moved their field to a land on Boulevard Pellegrini and San Jerónimo. In 1911 Unión requested affiliation to "Liga Rosarina de Football" which would allow them to play with stronger teams and more competitive tournaments so teams of Liga Rosarina participated in national cups with teams from Buenos Aires. The LRF accepted the request in 1912, and Unión debuted there vs. Argentino (3–3 tie). The first win in Liga Rosarina was vs Aprendices Rosarinos with the following line-up: José Luis Peíteado; Saúl Galetti, Domingo Pallavidini; José Ayala, Alfredo González, Domingo Gómez; Gregorio Aguirre, Arturo Pérez, Manuel Montenegro, Elías Pieretti, Domiciano Roa.
On 26 November 1966, Unión was promoted to the Primera División for the first time, after defeating Talleres (RE) 3–0 and winning the 1966 Segunda División title.
Unión's supporters are called "unionistas", "tatengues", while the squad is usually nicknamed "El Tate". The colours of the club consist of red and white vertical stripes.
Rivalry
Unión and Colón are the two largest football clubs in Santa Fe. The Clásico Santafesino has been played since 1913 and is known as one of football's fiercest and most important rivalries in Argentina. Unión and Colón have played 147 games all time against each other in the Amateur and Professional Era, with Unión winning 48, Colón winning 43, 51 draws and 5 no contest (there are no records for those matches, which took place between 1913 and 1917).
Players
Current squad
As of 2 July 2026
Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply. Players may hold more than one non-FIFA nationality.
Reserve squad
Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply. Players may hold more than one non-FIFA nationality.
Out on loan
Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply. Players may hold more than one non-FIFA nationality.
Records
Top 10 all-time goalscores at clubaunion.com.ar
Top 10 all-time most appearances at clubaunion.com.ar
Notable players
To appear in this section a player must have played at least 50 games for the club and/or played officially for their national team.
Managers
Honours
National
Primera División B
Winners (1): 1966
Regional
Campeonato de Primera División Santafesina
Winners (18): 1907, 1908, 1909, 1910 (LRSF) 1912, 1915, 1917, 1919, 1920 (LSF), 1925 (ASAF), 1926 (FSF), 1932, 1934, 1935, 1936, 1938, 1939, 1971 (LSF)
Copa de Competencia "Gobernador Manuel J. Menchaca"
Winners (3): 1916, 1917, 1919
Copa Estímulo
Winners (1): 1924
Torneo Preparación
Winners (2): 1935, 1937
Campeonato de Honor
Winners (2): 1938, 1939
Campeonato Absoluto
Winners (1): 1938
Torneo Clasificatorio
Winners (2): Clasificatorio 1971, Petit Torneo 1971
Federación de Fútbol de la Provincia de Santa Fe
Winners (1): Selectivo 1971
Other sports
The club hosts other sports such as archery, basketball, field hockey, gymnastics, martial arts, roller skating, swimming, volleyball, amongst others.
Basketball
Apart from football, basketball is the foremost sport practiced at the institution, Union's team plays in Liga Nacional de Básquet since 2021, when they won the 2021 Liga Argentina title and were promoted to the top league after 34 years.
Carlos Delfino is probably its most recognized former player, but Mario Elie a three time NBA champion (1994, 1995 y 1999), also played briefly for Unión in the Argentine League in 1987.