Club Atlético Lanús () is an Argentine sports club from the Lanús district of Greater Buenos Aires. Founded on 3 January 1915, the club's main sports are football and basketball. In both sports, Lanús plays in Argentina's top divisions: Primera División (football) and Liga Nacional de Básquet (basketball). Domestic football major titles won by the club include two Primera División championships, the Copa Bicentenario and one Supercopa Argentina. At international level, Lanús has won one Copa CONMEBOL, and one Copa Sudamericana. Other titles include four Second Division championships.