John Reynell (9 February 1809 - 15 June 1873) was an English-born emigrant to the colony of South Australian where he became established as a wheat farmer, a sheep and cattle breeder, and a vigneron and winemaker.

Reynell was born in Ilfracombe in 1809 from a Devonshire farming family. The Reynell family became established at East Ogwell in Devon in the 14th century. Accompanied by his cousin Samuel Reynell (c. 1818-1892), he arrived in South Australia in October