Nehemiah Eastman (16 June 1782-11 January 1856) was a member of the US House of Representatives (NR-NH AL) from 4 March 1825 to 3 March 1827, succeeding Matthew Harvey and preceding David Barker Jr.. Born in Gilmanton, he practiced law in Farmington before serving in the state house in 1813, in the state senate from 1820 to 1825, and in Congress.