Harrison is an unincorporated community in southeastern Fayette Township, Vigo County, in the U.S. state of Indiana. It is part of the Terre Haute metropolitan area. History Harrison was platted August 4, 1837, by Ann Potts, on the west side of the river from Fort Harrison, a military outpost in the region built in 1811 by General William Henry Harrison. Geography Harrison is located at at an elevation of 456 feet. References Unincorporated communities in Indiana Unincorporated communities in Vigo County, Indiana Terre Haute metropolitan area