Thomas Sackville, 1st Earl of Dorset (1536–April 19, 1608) was an English statesman and poet. He was a Member of Parliament and Lord High Treasurer. His house, Knole House, at Knole in Kent, is celebrated.

He was author, with Thomas Norton, of the play Gorboduc (1562).

He was created Baron Buckhurst, of Buckhurst in the County of Sussex, in 1567, and Earl of Dorset in 1604. He succeeded William Cecil, Lord Burghley as Lord Treasurer in 1599, and was a capable, if uninspired, financial manager. He died in 1608.

Queen Elizabeth I acquired Bexhill Manor in 1590 and granted it to Thomas.

Lord High Stewards | Lord High Treasurers | Knights of the Garter | Earls in the Peerage of England | English poets | 1536 births | 1608 deaths | Thomas Sackville de Dorset