John de Bourchier (alias Boussier, etc., d. c. 1329) was an English Judge of the Common Pleas and the earliest ancestor, about whose life substantial details are known, of the noble and prolific Bourchier family, which in its various branches later held the titles Barons Bourchier, Counts of Eu, Viscounts Bourchier, Earls of Essex, Barons Berners, Barons FitzWarin and Earls of Bath.