| Clubname: | San Martín (Tucumán) |
| Fullname: | Club Atlético San Martín |
| Nickname: | El Santo (The Saint) Los Cirujas (The Homeless) |
| Ground: | Estadio La Ciudadela, San Miguel de Tucumán, Argentina |
| Capacity: | 30,250[1] |
| Chairman: | Rubén Moisello |
| Manager: | Iván Delfino |
| League: | Primera Nacional |
| Season: | 2023 |
| Position: | Primera Nacional Zone A, 3rd (First round in Torneo Reducido) |
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Club Atlético San Martín (mostly known as San Martín de Tucumán) is an Argentine sports club founded in 1909 and based in the city of San Miguel de Tucumán, Tucumán Province. The club is notable for its football team, which currently plays in the Argentine Primera B Nacional, the second division of the Argentine football league system.
Other sports practised at the club are field hockey, handball, martial arts, rugby union, swimming, tennis and volleyball.