Jared Mansfield (May 23, 1759 – February 3, 1830) was an American teacher, mathematician and surveyor. His career was shaped by two interventions by President Thomas Jefferson. In 1801 Jefferson appointed Mansfield as Professor at the newly founded United States Military Academy at West Point. Again at Jefferson's appointment, Mansfield served as the Surveyor General of the United States from 1803 to 1812, charged with extending the survey of United States land in the Northwest Territory.