John Bastard may refer to:
John Bastard (c. 1688–1770), architect, one of the Bastard brothers John Pollexfen Bastard (1756–1816), MP for Devonshire John Bastard (naval officer) (c. 1787–1835), Royal Navy officer, MP for Dartmouth John Bastard (cricketer) (1817–1848), British cricketer
See also John I Doukas of Thessaly (died 1289), also known as John the Bastard Bastard (surname), including a list of people with the surname Bastard (disambiguation)