Gulian Crommelin Verplanck (6 August 1786-18 March 1870) was a member of the US House of Representatives (D-NY 3) from 4 March 1825 to 3 March 1833, succeeding Peter Sharpe and John J. Morgan and preceding Dudley Selden and Cornelius Lawrence. Born on Wall Street, the son of Daniel C. Verplanck, he practiced law in New York City before serving in the State Assembly from 1820 to 1821, 1822, and 1823. Formerly a Federalist, he served as a Jacksonian congressman. He defected to the Whigs in 1833 in response to the Bank War, and he was narrowly defeated for Mayor of New York in 1834. He later returned to the Democrats under James Buchanan, and he served in the state senate from 1838 to 1841 and as President of the New York State Board of Commissioners of Emigration from 1846 to 1870.