John Pecche (1332–1380) was a 14th-century merchant who was a Sheriff of London in 1352, Lord Mayor of London for 1361–62 and a Member of Parliament for four annual terms between 1361 and 1372. Pecche was a successful merchant and member of the influential Fishmongers who accumulated landed estates spread through half a dozen counties including Kent, Surrey, Cambridgeshire and Middlesex and substantial properties in three parishes in the city of London. His son by his first wife, Ellen, was William Pecche (1359–1399). His widow, his wife Mary, married Sir William Moigne.