John Lorenzo Young (30 May 1826 in London – 26 July 1881 at sea) was an English-Australian educationalist and founder of the Adelaide Educational Institution.
Young was born in London, the son of John Tonkin Young (1802?–10 April 1882), a builder from Veryan, Cornwall.
He was educated at the Communal College of Boulogne, under Professor Opel at Wiesbaden, in 1842 at the College for Civil Engineers in Putney, and at King's College London from 1843 to 1845, where John Howard Clark (later Sir John Howard Clark, editor of The Register and who conducted its "Geoffry Crabthorn" column) was a fellow student. Another reference says this fellow-student was Howard Clark's brother A. Sidney Clark. He worked in Cornwall on railway and mining construction then left for Adelaide in 1850. on the ship Panama, arriving on 31 October 1850. A fellow passenger was W. W. R. Whitridge, with whom he was to strike a lasting friendship. He joined the rush to the Victorian goldfields but soon returned.
In 1851 he became second master at the newly established South Australian High School, but the venture failed by the end of the year. Headmaster Charles Gregory Feinaigle (1817? – 10 March 1880), before 1860 spelled "Feinagle", opened a private academy at his residence Brandon on Unley Road, but was soon in Victoria, in a wide variety of vocations. He remained friends with J. L. Young: together they founded the Philosophical Society in January 1853, along with Whitridge, who by this time was editor of The Register), and he maintained active membership after he left Adelaide.
In December 1851 Young departed Adelaide via the overland route and the Victorian Goldfields at Mt Alexander. On 23 February 1852 Young Returned to Adelaide on board the Elizabeth. Young returned to the goldfields aboard the brig Louisa on 8 March and on 30 July arrived back in Adelaide aboard the Reliance. A letter later appears in the Register signed by Young and some passengers referring to 'mutinous conduct' by the crew and commending the efforts of the captain of the ship.