Ellicott City is an unincorporated community and census-designated place in Howard County, Maryland, United States. The population was 56,397 at the 2000 census. It is the county seat of Howard County. Founded in 1772, the town features a Baltimore and Ohio Railroad Station Museum, as well as a downtown historic district that is a popular destination among antiques shoppers. As of the 2000 Census, Ellicott City surpassed Towson, Maryland as the largest unincorporated county seat in the state. Ellicott City apartments for rent comparison page shows most up to date rent information on Ellicott City apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.