The Notre Dame de Namur Argonauts (also Notre Dame de Namur Argos) are the 11 varsity athletic teams that represent Notre Dame de Namur University, located in Belmont, California, in NCAA Division II intercollegiate sports.

The Argonauts compete as members of the Pacific West Conference for all sports except for men’s lacrosse, which competes in the Western Intercollegiate Lacrosse Association (WILA).