Earl of Hardwicke is a title in the Peerage of Great Britain. It was created in 1754 for Philip Yorke, 1st Baron Hardwicke, Lord Chancellor of Great Britain from 1737 to 1756. He had already been created Baron Hardwicke, of Hardwicke in the County of Gloucester, in 1733, and was made Viscount Royston at the same time as he was given the earldom. These titles were also in the Peerage of Great Britain. He was succeeded by his eldest son, the second Earl. He represented Reigate and Cambridgeshire in the House of Commons and served as Lord Lieutenant of Cambridgeshire. Lord Hardwicke married Lady Jemima Campbell, only daughter of John Campbell, 3rd Earl of Breadalbane, and granddaughter and heiress of Henry Grey, 1st Duke of Kent, who succeeded her grandfather as Marchioness Grey in 1722 (a ti