Viscount Hardinge, of Lahore and of Kings Newton in the County of Derby, is a title in the Peerage of the United Kingdom. It was created in 1846 for the soldier and Tory politician Sir Henry Hardinge. His son, the second Viscount, represented Downpatrick in Parliament. His great-great-grandson, the sixth Viscount, succeeded a distant relative as eighth Baronet, of Belle Isle in the County of Fermanagh, in 1986. This title had been created in the Baronetage of the United Kingdom 1801 for Richard Hardinge. He was the third son of Nicolas Hardinge, younger brother of Reverend Henry Hardinge and uncle of the latter's third son Henry Hardinge, 1st Viscount Hardinge. The baronetcy was created with special remainder to the heirs male of Richard Hardinge's father.

Henry Hardinge, 1st Viscount Hardinge, was a British Army officer and politician. After serving in the Peninsular War and the Waterloo Campaign he became Secretary at War in Wellington's ministry. After a tour as Chief Secretary for Ireland in 1830 he became Secretary at War again in Sir Robert Peel's cabinet. He went on to be Governor-General of India at the time of the First Anglo-Sikh War and then Commander-in-Chief of the Forces during the Crimean War.