Hiram Powers (July 29, 1805 – June 27, 1873) was an American neoclassical sculptor.
Powers was born to a farmer on July 29, 1805 in . When he was 14 years old, his family moved to Ohio, about six miles from Cincinnati, where Powers attended school for about a year while staying with his father's brother, a lawyer. He began working after the death of his parents, first superintending a reading-room in connection with the chief hotel of the town, then working a clerk in a general store. At age 17, Powers became an assistant to Luman Watson, Cincinnati's early wooden clockmaker, who owned a clock and organ factory. Using his skill in modeling figures, Powers mastered the construction of the instruments and became the first mechanic in the factory.
In 1826 he began to frequent the studio of Frederick Eckstein, and at once conceived a strong passion for the art of sculpture. His proficiency in modeling secured him the situation of general assistant and artist of the Western Museum, kept by a Louisiana naturalist of French extraction named Joseph Dorfeuille. Here he created representations of scenes in the poem Inferno by Dante, which met with extraordinary success.Fanny Trollope helped launch his career when she had him sculpt Dante's Commedia. After studying thoroughly the art of modeling and casting, he moved to Washington, D.C. at the end of 1834.
Powers drew attention and local commissions in D.C. with his modeled portrait of Andrew Jackson. In 1837 he moved to Italy and settled on the Via Fornace in Florence, where he had access to good supplies of marble and to traditions of stone-cutting and bronze casting. He remained in Florence till his death, though he did travel to Britain during this time. During his time in Italy, he developed a friendship with Horatio Greenough. He developed a thriving business in portraiture and "fancy" parlor busts, but he also devoted his time to creating life-size, full-figure ideal subjects, many of which were also isolated as a bust. In 1839 his statue of Eve won the admiration of the leading European neoclassical sculptor, Bertel Thorvaldsen.