Hagerstown is a city in Washington County, Maryland, United States. The population was estimated to be 38,326 in 2005, and the urban population is estimated to be around 72,000. It is the county seat of Washington County. It is a city on the edge of the Baltimore-Washington Metropolitan Area. The City also has its own Metropolitan Area. The population of the Metropolitan Area in 2000 was 222,771 and the 2006 estimate is 257,619. Hagerstown is the fastest-growing metropolitan area in the State of Maryland. Hagerstown is Western Maryland's Largest City. Hagerstown is Maryland's fifth largest city, if the total urban area would be one city, it would be Maryland's second-most populous city. Hagerstown apartments for rent comparison page shows most up to date rent information on Hagerstown apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.