Elizabeth Cavendish may refer to:

• Elizabeth Cavendish, later Elizabeth Stuart, Countess of Lennox
• Bess of Hardwick (1527–1608), Elizabethan courtier, married to Sir William Cavendish
• Elizabeth Cavendish, Duchess of Devonshire (1759–1824), wife of the fifth Duke of Devonshire
• Elizabeth Cavendish (lawyer), executive director of Appleseed Foundation
• Elizabeth Egerton (1626–1663), née Cavendish, writer
• Elizabeth Cavendish, Countess of Devonshire (1619–1689)
• Lady Elizabeth Cavendish (1926–2018) courtier

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