Club Atlético Porteño is an Argentine rugby union club sited in San Vicente, Buenos Aires. The club was founded on July 28, 1895 by Irish immigrants as a football team, which participated in tournaments organized by the Argentine Football Association until 1931 when the sport became professional in Argentina. The senior squad plays in Tercera, the sixth division of the URBA league system. Porteño also has a women's rugby section. The club has also a women's rugby team competing in "Torneo Femenino", organised by the same body.