Beaver Creek is an unincorporated community in eastern Washington County, Maryland, United States. Its population was 251 as of the 2010 census. It is located southeast of Hagerstown and north of Boonsboro near U.S. Route 40 and Maryland Route 66. The community is officially included in the Hagerstown Metropolitan Area. This town was founde…Beaver Creek is an unincorporated community in eastern Washington County, Maryland, United States. Its population was 251 as of the 2010 census. It is located southeast of Hagerstown and north of Boonsboro near U.S. Route 40 and Maryland Route 66. The community is officially included in the Hagerstown Metropolitan Area. This town was founded in 1766.