Mary Jean Harrold (March 12, 1947 – September 19, 2013) was an American computer scientist noted for her research on software engineering.

Harrold taught secondary mathematics in West Virginia, South Carolina, Ohio, and Pennsylvania from 1970 to 1982.

She stayed at the University of Pittsburgh as a visiting assistant professor.

[2] Mary Jean Harrold was named an ACM Fellow in 2003.

[3] In 2004, as a current CRA-W co-chair, Harrold (along with Prof. Carla Ellis and Dr. Jan Cuny) accepted the Presidential Award for Excellence in Science, Mathematics, and Engineering Mentoring (PAESMEM) award on behalf of CRA-W, for "significant achievements in mentoring women across educational levels".