Elizabeth de Berkeley, Countess of Warwick and Baroness Lisle (1386 – 28 December 1422), was an English noblewoman and heiress. She was the only child of Thomas de Berkeley, 5th Baron Berkeley, and Margaret de Lisle, 3rd Baroness Lisle. With her father's death in 1417, Elizabeth and her husband Richard de Beauchamp, 13th Earl of Warwick, became involved in an inheritance dispute with her cousin James Berkeley, initiating one of the longest lawsuits in English history.