Lieutenant-General Sir Henry King KCB (4 July 1776 – 25 November 1839) was a British Army officer and Member of Parliament for County Sligo in Ireland.

He was the fourth son of Robert King, 2nd Earl of Kingston (1754–1799).

Henry King joined the army as an ensign in the 47th Foot in 1794.

Following the disbandment of his battalion in 1816 he was appointed to the office of Groom of the Bedchamber to the Prince Regent, afterwards George IV of the United Kingdom, serving from 1817 to 1830.

He lived at Grove Lodge at Winkfield Row, near Windsor in Berkshire.