Mary Petty (April 29, 1899 – March 6, 1976) was an illustrator of books and magazines best remembered for a series of covers done for The New Yorker featuring her invented Peabody family.

New Yorker publisher Harold Ross gave Petty's cartoons his top grade of "AAA.

"[1] Petty's style was characterized by her "gentle satirization of New York City's Victorian era society.

Her last New Yorker cover was published on March 19, 1966, and showed elderly "Mrs. Peabody" pulling on a broken calling cord.

[1] Petty was assaulted and beaten by a mugger on December 1, 1971, and was found three days after the incident on Ward's Island.