Lida Baker Kittrell Barrett (May 21, 1927 – January 28, 2021[1]) was an American mathematics professor and administrator.

After retirement as Dean Emerita from MSU, she was a Senior Associate to the head of the Education Directorate at the National Science Foundation for three years and then served as a Professor of Mathematics at the United States Military Academy at West Point for three years.

[2] From 1979 to 1982, Barrett chaired the American Mathematical Society's Committee on Employment and Educational Policy.

[3] In 2008 she received the MAA Yueh-Gin Gung and Dr. Charles Y. Hu Award for Distinguished Service to Mathematics.

Her AWM fellow citation read "for her profound and long-lasting effect in diversifying the committees and leadership of the MAA, during and beyond her term as its second woman president; for her value to the mathematics community as a pioneer and defender of women and underrepresented groups".