His Majesty's Principal Secretary of State for India, known for short as the India secretary or the Indian secretary, was the British Cabinet minister and the political head of the India Office responsible for the governance of the British Indian Empire, including Aden, Burma and the Persian Gulf Residency. The post was created in 1858 when the East India Company's rule in Bengal ended and India, except for the Princely States, was brought under the direct administration of the government in Whitehall in London, beginning the official colonial period under the British Empire.

Charles Wood, 1st Viscount Halifax, known as Sir Charles Wood, 3rd Baronet, between 1846 and 1866, was a British Whig politician and Member of the British Parliament. He served as Chancellor of the Exchequer from 1846 to 1852.