James George Maguire (February 22, 1853 – June 20, 1920) was an American attorney, politician and Georgist who served in the California State Assembly from 1875 to 1877, the San Francisco County Superior Court from 1883 to 1889, and the United States House of Representatives 1893 to 1899. He was the unsuccessful Democratic nominee for Governor of California in 1898, losing to Republican Henry T. Gage. Short in stature but weighing over two hundred pounds, Maguire was nicknamed the "Little Giant," a sobriquet that came to be used by friends and foes alike.