title: Lord Castlereagh (disambiguation)
text: # Lord Castlereagh (disambiguation)
  
  Lord Castlereagh may refer to:
  
  * Lord Castlereagh (1769–1822), Anglo-Irish politician
  * Marquess of Londonderry, courtesy title for heirs to the peerage
  * Lord Castlereagh (painting), an 1809 portrait by Thomas Lawrence
  * Lord Castlereagh (1802 ship), named after the politician
  * Lord Castlereagh (1803 ship), named after the politician
  