Joseph Wilton RA (16 July 1722 – 25 November 1803) was an English sculptor. He was one of the founding members of the Royal Academy in 1768, and the academy's third keeper. His works are particularly numerous memorialising the famous Britons in Westminster Abbey.
Born the son of an ornamental plasterer in the Charing Cross area of London, his father had sculpted the ceilings of the Foundling Hospital there. His father wished him to be a civil engineer but he strongly desired to be a sculptor.
Wilton initially trained under Laurent Delvaux at Nivelles, in present-day Belgium. In 1744 he left Nivelles and went to the Academy in Paris to study under Jean-Baptiste Pigalle. In 1752 he went to Italy with his sculptor friend Louis-François Roubiliac to learn to sculpt in marble, and stayed for seven years, living first in Rome and then in Florence. Whilst in Rome he met and befriended his first patron, William Locke of Norbury, who thereafter accompanied Wilton on his tour of Italy. Like many other artists of the day, he studied antiquities, and made numerous plaster casts and marble copies of classic works – many of these later formed the collection of Charles Lennox, 3rd Duke of Richmond at Richmond House in west London. A marble bust of the physician and scholar Antonio Cocchi, carved by Wilton in 1755, his last year in Italy, is in the collection of the Victoria and Albert Museum. Influenced by Wilton's study of antique busts, it was considered by Margaret Whinney to be one of Wilton's most distinguished works.
While in Florence he made the acquaintance of the Florentine painter Giovanni Battista Cipriani. When Wilton and the architect William Chambers returned to England, in August 1755, Cipriani went with them.