Elizabeth Cavendish may refer to:
- Elizabeth Cavendish, later Elizabeth Stuart, Countess of Lennox
- Bess of Hardwick, Elizabethan courtier, known as Bess of Hardwick
- Elizabeth Cavendish, Duchess of Devonshire, wife of the fifth Duke of Devonshire
- Elizabeth Cavendish (lawyer)
- Elizabeth Egerton, née Cavendish, writer