Joseph Peacock or Peacocke may refer to:
Joseph Peacock (architect) (1821–1893), British architect Joseph Peacock (politician), South Australian politician and businessman Joseph Peacocke (archbishop of Dublin) (1835–1916), Irish Anglican bishop Joseph Peacocke (bishop of Derry and Raphoe) (1866–1962), Irish Anglican bishop; son of the above Joseph Peacocke (cricketer) (1904–1961), Irish cricketer