Eleanor of Lancaster (c. 1311 - 11 January, 1372) was born in Arundel, West Sussex, England.

She was the daughter of Maud Chaworth and Henry Plantagenet, 3rd Earl of Leicester.

Her first husband was John Beaumont, 2nd Baron Beaumont, with whom she had two children:

  • Henry Beaumont, 3rd Baron Beaumont (b. 1340.)
  • Joan Beaumont

Her second marriage occured February 5, 1345 at Ditton Church, Stoke Poges, Buckingham. She married Richard Fitzalan, 10th Earl of Arundel, with whom she had five children:

  • John Fitzalan of Arundel, Lord of Maltravers (b. bef. 1349)
  • Sir Richard Fitzalan, 11th Earl of Arundel (b. 1346)
  • Joan Fitzalan (b. before 1351)
  • Alice Fitzalan of Arundel (b. 1352)
  • Thomas Fitzalan, Archbishop of York (b. 1353)

She is buried at Lewes Priory in Lewes, Sussex, England.