Frederick County is located in Maryland, United States. As of the 2020 U.S. census, the population was 271,717. The county seat is Frederick. The county is part of the Capital region of the state.
Downtown Frederick with the Blue Ridge Mountains in the distance in June 2014
I-70 and US 40 in Frederick County
Frederick is a city in and the county seat of Frederick County, Maryland, United States. Frederick's population was 78,171 people as of the 2020 census, making it the second-largest incorporated city
Downtown Frederick's City Hall in 2022
Catoctin Mountain, located north of Frederick
The Evangelical Lutheran Church, a Lutheran church in Frederick, built in 1752
Confederate troops marching south on North Market Street in Frederick during the American Civil War