Robert Large (died 1441) was a London merchant, a member of the Worshipful Company of Mercers, who was Mayor of London and a Member of Parliament. He was served as one of the Mercers' four yearly wardens in 1427 and was Sheriff of London in 1430-31. In 1437/8, he was the wealthy master to whom the young William Caxton was apprenticed. He was Member of Parliament in 1435 for the City of London as one of the two aldermanic representatives and was elected Lord Mayor in 1439-40. He died in 1441, and his will was proved in the Prerogative Court of Canterbury.