Frederick County, Maryland, USA

Frederick County is in north-central Maryland, with the city of Frederick as its county seat. Its landscape includes Catoctin Mountain and South Mountain, rolling Piedmont terrain and the Monocacy River valley. The Monocacy flows south through the county toward the Potomac River, linking a network of stream valleys and agricultural land. Created in 1748, the county has a long farming history alongside towns, industrial areas and newer suburban communities. Its historic places include sites associated with the Civil War and the region’s early transportation routes.