Lady Margaret Radclyffe Livingstone Eyre (née Kennedy, 16 June 1800 – 3 September 1889), later incorrectly called the Countess of Newburgh, was a Scottish aristocrat and philanthropist.

Her parents were Margaret (born Erskine) and Archibald Kennedy, twelfth Earl of Cassillis.

[1] She married at her family seat of Culzean Castle in Scotland on 14 November 1817 to Thomas Radclyffe-Livingstone-Eyre.

[1] She sat for a portrait by Orazio de Manara which is now held by the National Trust at Hardwick Hall, Derbyshire.

[2] By 1850 she had converted to the Catholic church and she worked with and was good friends with fellow aristocrats Lady Georgiana Fullerton and Cecil Chetwynd Kerr, Marchioness of Lothian.