Sir John Gurney KC (14 February 1768 – 1 March 1845) was a British barrister and judge.
Born into a family of noted stenographers, he was educated at St Paul's School and was called to the Bar by the Inner Temple on 3 May 1793.
After distinguishing himself in a libel trial, Gurney became junior counsel in a variety of state trials during the 1790s.
After several more noted cases during the early 19th century, he was knighted and made a Baron of the Exchequer on 13 February 1832, a position he gave up in 1845 due to ill-health, dying the same year.