Ruth Marguerite McKenney (November 18, 1911 – July 25, 1972) was an American author and journalist, best remembered for My Sister Eileen, a memoir of her experiences growing up in Ohio and moving to Greenwich Village with her sister Eileen McKenney. Originally published as a series of short stories in The New Yorker, My Sister Eileen was published in book form in 1938, and later adapted under the same name into a play, a radio play (and unproduced radio series), two films, and a CBS television series. It was also the basis for the Leonard Bernstein musical Wonderful Town.