Baron Darcy de Knayth is a title in the Peerage of England. It was created in 1332 for John Darcy (or D'Arcy) with remainder to his heirs general, allowing daughters to inherit.

At the death of the sixth baron, the barony fell into abeyance between his two daughters, which the Sovereign terminated in 1641 in favour of Conyers Darcy, as he was also an heir of the abeyant Barony Darcy de Darcy (created 1509). He also successfully petitioned for the termination of the abeyance of the Barony of Conyers in his favour, and both baronies were considered new creations, with remainder to his heirs male. He was called to parliament as Baron Darcy and Conyers.

  • Philip Darcy, 6th Baron Darcy de Knayth (1397–1418) (abeyant 1418), married Eleanor FitzHugh, daughter of Henry FitzHugh, 3rd Baron FitzHugh. They had two daughters:
  • Elizabeth Darcy, married Sir James Strangeways.
  • Margaret Darcy, married Sir John Conyers of Hornby; their grandson William Conyers, 1st Baron Conyers was an ancestor of the 7th Baron.
  • Conyers Darcy, 7th Baron Darcy de Knayth (1570–1654) (abeyance terminated 1641)
  • Conyers Darcy, 1st Earl of Holderness, 8th Baron Darcy de Knayth (died 1689)
  • Conyers Darcy, 2nd Earl of Holderness, 9th Baron Darcy de Knayth (–1692)
  • Robert Darcy, 3rd Earl of Holderness, 10th Baron Darcy de Knayth (1681–1722)
  • Robert Darcy, 4th Earl of Holderness, 11th Baron Darcy de Knayth (1718–1778) (dormant)
  • Amelia Osborne, de jure 12th Baroness Darcy de Knayth (née Darcy) (1754–1784)
  • George William Frederick Osborne, 6th Duke of Leeds, de jure 13th Baron Darcy de Knayth (1775–1838)
  • Francis Godolphin Darcy-Osborne, 7th Duke of Leeds, de jure 14th Baron Darcy de Knayth (1798–1859)
  • Sackville Lane-Fox, 12th Baron Conyers, de jure 15th Baron Darcy de Knayth (1827–1888) (abeyant 1888)
  • Violet Ida Evelyn Herbert, 16th Baroness Darcy de Knayth (1865–1929) (abeyance & dormancy terminated 1903)
  • Mervyn Horatio Herbert, 17th Baron Darcy de Knayth (1904–1943)
  • Davina Marcia Ingrams, 18th Baroness Darcy de Knayth (1938–2008)
  • Caspar David Ingrams, 19th Baron Darcy de Knayth (born 1962)