Marysville is a borough in Perry County, Pennsylvania, United States. The population was 2,425 in July 2008. It is part of the Harrisburg - Carlisle Metropolitan Statistical Area.The Borough was settled in 1755, incorporated as the Borough of Haley in 1866, and re-incorporated as the Borough of Marysville in 1867.HistoryThe Rockville Bridge was added to the National Register of Historic Places in 1975.GeographyMarysville is located at .According to the United States Census Bureau, the borough has a total area of 2.4sqmi, all of it land.Marysville is bordered by the Appalacian Mountains to the north and south, by the Susquehanna River to the east, and by Rye Township to the west. U.S. Route 11/15 serves as the primary transportation routes for Marysville residents.DemographicsAs of the census of 2000, there were 2,306 people, 1,027 households, and 635 families residing in the borough. The population density was 966.8 people per square mile (372.5/km²). There were 1,103 housing units at an average density of 462.4 per square mile (178.2/km²). The racial makeup of the borough was 98.44% White, 0.17% African American, 0.09% Asian, 0.22% from other races, and 1.08% from two or more races. Hispanic or Latino of any race were 0.22% of the population.