William of Bardfield, William de Berdefeld or William de Bardesfeld was an English-born lawyer of the late thirteenth and early fourteenth century who enjoyed a successful legal career in England before moving to Ireland, where he was successively Serjeant-at-law (Ireland), justice of the Court of Common Pleas (Ireland), and justice of the Court of the Justiciar of Ireland.

Great Bardfield is a large village in the Braintree district of Essex, England. It is located approximately 9 mi (14 km) northwest of the town of Braintree, and approximately 12 mi (19 km) southeast of Saffron Walden.