Sir Robert King (c. 1599–1657) was an Irish soldier and statesman. He was the eldest son of Sir John King (died 1637), Clerk of the Crown and Hanaper and MP for Roscommon, and his wife Catherine Drury (died 1617), daughter of Robert Drury of Laughlin and Elizabeth Carew, and grand-niece of Sir William Drury, Lord President of Munster. His eight siblings included the writer Dorothy Durie and the poet Edward King, whose early death inspired John Milton to write the poem "Lycidas". His father, who emigrated from Yorkshire to Ireland in the 1580s, became an indispensable Crown servant and a major landowner with estates in twenty-one counties.