Marriage and children
Legacy and honors
- 1948, the National Urban League featured Alexander as "Woman of the Year" in its comic book of Negro Heroes.
- 1974, she was awarded an honorary doctorate by the University of Pennsylvania, her first of seven such honors
- An elementary school in West Philadelphia, the Sadie Tanner Mossell Alexander University of Pennsylvania Partnership School ("Penn Alexander"), is named after her. The public school was developed in partnership with the University, which supports the school financially and academically.
- The Raymond Pace and Sadie Tanner Mossell Alexander Professorship at the University of Pennsylvania is named in her honor.