Viscount Palmerston was a title in the Peerage of Ireland. It was created on 12 March 1723 for Henry Temple, who subsequently represented East Grinstead, Bossiney and Weobley in the British House of Commons. He was made Baron Temple, of Mount Temple in the County of Sligo, at the same time, also in the Peerage of Ireland. He was succeeded by his grandson, the 2nd Viscount, who represented seven constituencies in the House of Commons and served as a Lord of the Admiralty and Lord of the Treasury. On his death the titles passed to his son, the 3rd Viscount, who became a distinguished politician and served three times as Foreign Secretary and twice as Prime Minister of the United Kingdom. At his death in 1865 the 3rd Viscount was granted a state funeral, the fourth non-royal to be given this honour. Lord Palmerston was childless and the barony and viscountcy became extinct on his death.