Matina Souretis Horner (born July 28, 1939) is an American psychologist who was the sixth president of Radcliffe College.

[4] Horner joined the Harvard faculty as lecturer in the Department of Social Relations in 1969 and in 1970 became assistant professor of personality and development.

During the tenure of her predecessor, Mary Bunting, the relationship between Harvard University and Radcliffe had evolved into what was known as the "non-merger merger.

Additionally, Radcliffe had ceded some business operations such as payroll, accounting, dining halls, library, and buildings and grounds to Harvard, but maintained control of and administered its own educational, research and alumnae programs.

"[6] Although Horner had many responsibilities, she made contact with Radcliffe students a priority during her presidency by holding weekly conferences and teaching several classes.