William M. McCarty (May 15, 1859 – December 19, 1918) was a justice of the Utah Supreme Court from 1903 to 1918. Born in Alpine, Utah, to James Hardwick McCarty and Lydla Margaret Cragun McCarty, McCarty attended Brigham Young Academy in 1881 and 1882, after finishing the public schools. He began the practice of law early in life, studying law while engaged in the work of driving a wagon freight team between points in Utah and the mines of Nevada. Ploche and Bristol were two of the principal points to which he carried products of the farm for the miners. At night in the camping places, some of which were along the old road in the Escalante desert, McCarty studied his law books while companions played cards or "told yarns".