Nicholas Duck (1570 – 28 August 1628), of Heavitree and of nearby Mount Radford in the parish of St Leonards, both next to Exeter in Devonshire, was an English lawyer who served twice as a Member of Parliament for Exeter, in 1624 and 1625. He was one of the Worthies of Devon of the biographer John Prince (1643–1723), whose wife was his great-niece.