Louisa Murray, 2nd Countess of Mansfield (née Cathcart, later Greville; 1758 – 11 July 1843),[1] was a Scottish noblewoman.

Their five children were: The family seat was Scone Palace, but the Viscount was the British ambassador in Paris, where his close friend Madame du Deffand commented that his new wife "is pretty, she holds herself badly, and has not a charming manner, but her expression is full of intelligence".

Improvements to Scone Palace were worked on by George Paterson until 1783, when the house was considered suitable as a regular residence.

[6] By her second husband she had a further three children: Queen Charlotte sent a letter to Lady Mansfield on 5 January 1801 writing:Madam, I have communicated the contents of your letter to his Majesty, who perfectly agrees with you & Mr Greville that the Princes of Orleans, being foreigners of distinction, should have leave to pass through Richmond Park.

[8] She died on 11 July 1843 and was buried in her second husband's family tomb in the chapter house at the Collegiate Church of St Mary, Warwick.