李曼·法兰克·鲍姆（英语：Lyman Frank Baum，1856年5月15日－1919年5月6日），又译为富兰克·鲍姆，是个美国作家、演员、报纸编辑，也曾是独立电影的电影监制。

《绿野仙踪》（The Wonderful Wizard of Oz，1900年，又译为《神秘欧兹国》、《奥兹国之伟大巫师》）是他最有名的美国儿童文学著作。此书后被改编为电影《绿野仙踪》（1939年）。在《绿野仙踪》大受欢迎之后，陆续创作奥兹国相关系列作品14本。

他的第一本童话著作是《鹅妈妈故事集》（Mother Goose in Prose，1897年），一生共有约50部著作。

Lyman Frank Baum (May 15, 1856 – May 6, 1919), better known by his pen name L. Frank Baum, was an American author chiefly known for his children's books, particularly The Wonderful Wizard of Oz. He wrote thirteen novel sequels, nine other fantasy novels, and a host of other works (55 novels in total, plus four "lost works", 83 short stories, over 200 poems, an unknown number of scripts, and many miscellaneous writings), and made numerous attempts to bring his works to the stage and screen. His works anticipated such century-later commonplaces as television, augmented reality, laptop computers (The Master Key), wireless telephones (Tik-Tok of Oz), women in high risk, action-heavy occupations (Mary Louise in the Country), and the ubiquity of advertising on clothing (Aunt Jane's Nieces at Work).