Halfway is a census-designated place in Washington County, Maryland, United States. The population was 10,065 at the 2000 census. It is named for being halfway between Hagerstown and Williamsport. Halfway is a major suburb of Hagerstown, Maryland. Halfway is part of the Hagerstown-Martinsburg, MD-WV,MSA Halfway apartments for rent comparison page shows most up to date rent information on Halfway apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.