Emily Temple, Viscountess Palmerston (née Lamb, later Clavering-Cowper; 1787–1869), styled The Honourable Emily Lamb from 1787 to 1805 and Countess Cowper from 1805 to 1839, was a leading figure of the Almack's social set, sister to Prime Minister Lord Melbourne, wife to the 5th Earl Cowper, and subsequently wife to another Prime Minister Lord Palmerston.