Sir John Cary (died 1395), of Devon, was a judge who rose to the position of Chief Baron of the Exchequer (1386–88) and served twice as Member of Parliament for Devon, on both occasions together with his brother Sir William Cary, in 1363/4 and 1368/9.
He was a son of Sir John Cary, Knight, by his second wife Jane de Brian, a daughter and co-heiress of Sir Guy de Brian (died 1349) (alias de Brienne), of Walwyn's Castle in Pembrokeshire and Torr Bryan, in Devon, and sister of Guy de Bryan, 1st Baron Bryan, KG (died 1390).
He served twice as Member of Parliament for Devon, on both occasions together with his brother Sir William Cary, in 1363/4 and 1368/9, and in November 1386 he was appointed Chief Baron of the Exchequer.
He was a strong adherent to King Richard II (1377–1399) and was attainted in 1388 by the Merciless Parliament, at which many members of Richard II's Court were convicted of treason. He was initially sentenced to death for his part in the "Nottingham judgements", but this was commuted to banishment to Ireland with a pension of £20. His landholdings and goods were thereupon forfeited to the Crown. Many of his forfeited lands in Somerset, including Hardington Mandeville, a moiety of Chilton Cantelo, and premises in Trent (now in Dorset) were sold by the crown in July 1389 for 600 marks, jointly to Sir John Wadham (died 1412) of Edge, Branscombe in Devon and Merryfield, Ilton, Somerset, Justice of the Common Pleas (1389–1398) and MP for Exeter in 1399 and for Devon in 1401, together with Sir William Hankford (c. 1350 – 1423) of Annery in the parish of Monkleigh in Devon, Chief Justice of the King's Bench. His son and heir Sir Robert Cary married as his second wife Jane Hankford, daughter of Sir William Hankford and, according to Sir John Vivian, the widow of Sir John Wadham, although the will of John Wadham does not appear to support Vivian's contention. The attainder was reversed in 1398.