Richard Sackville may refer to: Sir Richard Sackville (escheator) (died 1566), English administrator and MP for Chichester Richard Sackville, 3rd Earl of Dorset (1589–1624), Lord Lieutenant of Sussex, first husband of Lady Anne Clifford Richard Sackville, 5th Earl of Dorset (1622–1677), English politician, Lord Lieutenant of Middlesex, and Sussex Richard Sackville (by 1501 – 1545 or 1546), MP for Arundel