Amabel Hume-Campbell, 1st Countess De Grey

Amabel Hume-Campbell, 1st Countess de Grey, 5th Baroness Lucas (née Yorke; 23 January 1751 – 4 March 1833), was a British diarist and political writer. She held noble titles in her own right, including Countess de Grey and Baroness Lucas.

Born in 1751, she was the elder daughter of Philip Yorke, 2nd Earl of Hardwicke, and Jemima Campbell, 2nd Marchioness Grey and 4th Baroness Lucas. Her place of birth and early education are not specified, but she was educated at home, possibly at Wrest Park in Bedfordshire or in London at her family's residence in St James's Square.

From a young age, she demonstrated an interest in books and learning. She became a diarist and has surviving writings reflecting her thoughts and observations. Her artistic talents included etching and printmaking; she was instructed by James Basire, Alexander Cozens, and James Bretherton. Her printwork is preserved in the British Museum.

As a woman with political interests, she engaged in writings on political matters, notably the French Revolution. Had she been male, her status and interests suggest she would have served or been active in the House of Lords as a Whig.

In her personal life, she married Alexander Hume-Campbell, Lord Polwarth, on 17 August 1780, and their marriage was childless. In 1797, she inherited the title of 5th Baroness Lucas from her mother. Later, in 1816, she was created Countess de Grey in her own right, with a special remainder to her sister and her sister’s male heirs. Her younger sister, Mary Yorke, predeceased her; Mary was married to Thomas Robinson, 2nd Baron Grantham, and had children, including the eldest male heir who inherited the earldom of de Grey and the barony of Lucas.

Lady Amabel Hume-Campbell died in Westminster in 1833. Upon her death, she left over 4,000 etchings to the British Museum, many of which are believed to have been part of her personal collection.