| Type: | Bishop |
| John Gynwell | |
| Bishop of Lincoln | |
| Religion: | Catholic |
| Appointed: | 23 March 1347 |
| Term End: | 5 August 1362 |
| Predecessor: | Thomas Bek |
| Successor: | John Bokyngham |
| Consecration: | 23 September 1347 |
| Death Date: | 5 August 1362 |
John Gynwell (died 1362) was a medieval Bishop of Lincoln. He was nominated on 23 March 1347 and consecrated on 23 September 1347. He was involved in controversy in 1357, when his servant Simon Warde was accused of violent affray with certain members of the Order of Hospitallers. A commission of inquiry was set up to look into the matter, but the matter ended inconclusively. He died on 5 August 1362.[1]