Club Atlético Sarmiento is an Argentine sports club based in Junín, Buenos Aires Province, Argentina. The club currently competes in Primera División, the top division of the Argentine football league system.
Founded in 1911 and affiliated to AFA in 1952, Sarmiento had two earlier stints in the Primera División (1981, 1982, 2015, 2016, and 2016–2017) before being promoted again before the 2021 season. The team's highest final position in the Primera División was 13th (of 18 teams) in 1981.