Mary Tsingou (married name: Mary Tsingou-Menzel; born October 14, 1928) is an American physicist and mathematician of Greek ancestry.
She is known for being one of the first programmers on the MANIAC computer at Los Alamos National Laboratory and for work in conjunction with Enrico Fermi, John Pasta, and Stanislaw Ulam which became the inspiration for the fields of chaos theory and scientific computing.