Data from the 1970 National Fertility Study are used to assess the extent and determinants of post-nuptial education among women in the United States. Over one-fifth of all women have attended high school or college since marriage; over one-third either have returned to school or anticipate returning to an academic institution sometime in the future. This phenomenon is apparently increasing since women married less than five years have already attended school in as great a proportion as women married 15–19 years. Examination of differentials reveals for both blacks and whites that post-nuptial education is higher among women who: (1) attended college before marriage, (2) married early, (3) are currently separated or divorced, (4) support egalitarian sex-role attitudes, or (5) whose most recent occupation is in the professional, managerial, or administrative category. Post-nuptial trends in education undoubtedly reflect the much broader social phenomenon of changing sex-role perceptions.