John Garnier (26 April 1813 – 26 March 1838) was an English first-class cricketer and clergyman. The son of The Reverend Thomas Garnier, he was born in April 1813 at Bishopstoke, Hampshire. He was educated at Winchester College, before going up to Exeter College, Oxford. While studying at Oxford, he made a single appearance in first-class cricket for Oxford University against the Marylebone Cricket Club at Oxford in 1832. Batting twice in the match, he was run out for 4 runs in the Oxford first innings, before being dismissed leg before wicket for 3 runs in their second innings. He was elected a fellow of Merton College in 1835.