Mansfield is a borough located in southern Tioga County, Pennsylvania, United States, in the Tioga River valley. It is situated at the intersection of U.S. Route 6 and U.S. Business Route 15, about 36 miles (58 km) southwest of Elmira, New York. In 1800, an English settler from Rhode Island named Asa Mann cleared a large amount of forest, and in 1804 laid out the plan for a town on this estate—Mann's field. The borough was incorporated in 1857. In the same year, the Mansfield Classical Seminary was founded, which became a state normal school in 1862 and is today Mansfield University Of Pennsylvania.