Isabel le Despenser, Countess of Worcester

Isabel le Despenser, Countess of Worcester and Warwick (26 July 1400 – 1439) was the posthumous daughter and eventually the sole heiress of Thomas le Despenser and his wife, Constance of York. She was born six months after her father had been beheaded for plotting against King Henry IV of England.

Isabel married Richard de Beauchamp, 1st Earl of Worcester who died in 1422 at the siege of Meaux. They had a daughter, Elizabeth de Beauchamp, Lady of Abergavenny, born 1415.

Isabel married again, to Richard de Beauchamp, 13th Earl of Warwick (her 1st husband's cousin), by whom she had two children:

• Henry, who succeeded his father as Earl of Warwick, and later became Duke of Warwick;
• Anne, who became 16th Countess of Warwick, following the death of her brother, and his daughter and her namesake. Anne married Richard Neville, the Kingmaker, eldest son of Richard Neville, 5th Earl of Salisbury.