Ellicott City is a census-designated place located in Howard County, Maryland. As of the 2000 census, the CDP had a total population of 56,397. It is the county seat of Howard County. Founded in 1772, the town features a Baltimore and Ohio Railroad Station Museum (with a station built in 1831), as well as a downtown historic district.
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Mars-GroupProvides transportation planning and traffic engineering services. List of clients, projects and services.