Mary Louise Booth was an American editor, translator, and writer. She was the first editor-in-chief of the women's fashion magazine, Harper's Bazaar.

Harper's Bazaar is an American monthly women's fashion magazine. It was first published in New York City on November 2, 1867, as the weekly Harper's Bazar. Harper's Bazaar is published by Hearst and considers itself to be the style resource for "women who are the first to buy the best, from casual to couture". Since its debut in 1867, as the U.S.'s first fashion magazine, its pages have been home to talent such as the founding editor, author and translator Mary Louise Booth, as well as numerous fashion editors, photographers, illustrators and writers. Harper's Bazaar targets an audience of professional women ranging from their twenties to sixties, who are interested in culture, travel, and luxury experiences.