John Bowyer Nichols (1779–1863) was an English printer and antiquary.
The eldest son of John Nichols, by his second wife, Martha Green (1756–1788), he was born at Red Lion Passage, Fleet Street, London, 15 July 1779. He spent his early years with his maternal grandfather at Hinckley, Leicestershire, and was educated at St Paul's School, London, which he left in September 1796 to enter his father's printing office.
He had a part in the editorship of the Gentleman's Magazine, and contributed under the initials J. B. N., or N. R. S. (the final letters of his name). He became the sole proprietor of the magazine in 1833, and in the following year transferred a share to William Pickering of Piccadilly. This share he subsequently repurchased, and in 1856 conveyed the whole property to John Henry Parker of Oxford.
The printing firm became J. Nichols, Son, & Bentley, with an office at the Cicero's Head, Red Lion Passage, Fleet Street, as well as at 25 Parliament Street, Westminster. Nichols had become one of the printers of the votes and proceedings of the Houses of Parliament, an appointment in which he followed his father and William Bowyer (1699–1777). For a short time he was printer to the corporation of the city of London. In 1821, after the resignation of his father, he became one of the three registrars of the Royal Literary Fund. He was master of the Stationers' Company in 1850, having served all the annual offices.
Towards the end of his life he became blind. He was a fellow of the Linnean Society (1812) and of the Society of Antiquaries of London (1818), and was appointed their printer in 1824; he was an original member of the Athenæum Club, the Royal Archaeological Institute, the Numismatic Society, and the Royal Society of Literature. He also filled various public offices in Westminster.