Constantine Henry Phipps, 1st Marquess of Normanby,, styled Viscount Normanby between 1812 and 1831 and known as The Earl of Mulgrave between 1831 and 1838, was a British Whig politician and author. He notably served as Lord Lieutenant of Ireland from 1835 to 1839 and as Home Secretary from 1839 to 1841 and was British Ambassador to France between 1846 and 1852.

The Secretary of State for the Home Department, more commonly known as the Home Secretary, is a senior minister of the Crown in the Government of the United Kingdom and the head of the Home Office. The position is a Great Office of State, making the home secretary one of the most senior and influential ministers in the government. The incumbent is a statutory member of the British Cabinet and National Security Council.