What is Frederick County, Maryland?
[[Image:Flag of Frederick County, Maryland.svg|right|250px]] [[Image:Seal of Frederick County, Maryland.png|right|200px]] '''Frederick County''' is a [[County (United States)|county]] in the state of [[Maryland]]. It has an area of 667 square miles. {{Frederick County, Maryland}} {{DCMetroArea}} {{US-geo-stub}} [[Category:Maryland counties]] [[Category:1748 establishments]] [[Category:1740s establishments in the Thirteen Colonies]] [[Category:18th-century establishments in Maryland]]