Frances Marsham, Lady Romney (9 July 1755 – 15 January 1795), formerly Lady Frances Wyndham, was the wife of British politician Charles Marsham, 1st Earl of Romney. Although occasionally referred to as "Countess of Romney", she died before her husband was raised to the earldom in 1801. She was born at Petworth, England, the daughter of Charles Wyndham, 2nd Earl of Egremont, and his wife, the former Hon. Alicia Maria Carpenter, who was herself the daughter of George Carpenter, 2nd Baron Carpenter of Killaghy.