John Rouse Bloxam (1807–1891) was an English academic and clergyman, the historian of Magdalen College, Oxford.
Born at Rugby on 25 April 1807, he was the sixth son of Richard Rouse Bloxam, D.D. (died 28 March 1840), under-master of Rugby School for 38 years, and rector of Brinklow and vicar of Bulkington, both in Warwickshire, who married Ann, sister of Sir Thomas Lawrence. All the six sons were foundationers at Rugby School, and all attended, as chief mourners, the funeral of Lawrence in St Paul's Cathedral.
Bloxam was sent in 1814 to Rugby School, where he was a school-fellow of Roundell Palmer, and obtained an exhibition at the University of Oxford in 1826. He matriculated from Worcester College, Oxford, on 20 May 1826, and was bible clerk there from that year to 1830. From 1830 to 1835 he held a demyship at Magdalen College, and graduated B.A. from that college on 9 February 1832, having been in the fourth (honorary) class in classics in 1831. He was ordained deacon by the bishop of Oxford in 1832 and priest in 1833, and took the further degrees of M.A. in 1835, B.D. in 1843, and D.D. in 1847.
In July 1832 Bloxam became chaplain and classical master in the private school at Wyke House, near Brentford, where Dr. Alexander Jamieson was principal, and from 1833 to 1836 he was second master at Bromsgrove School. He was elected probationer fellow of Magdalen College in 1835, and came into residence in 1836. He served as pro-proctor of the university in 1841, and he held at his college the posts of junior dean of arts (1838 and 1840), bursar (1841, 1844, 1850, 1854, and 1859), vice-president (1847), dean of divinity (1849), and librarian (1851 to 1862).