Frederick County Flag

Frederick County

State:
Maryland
County Seat:
Frederick

Frederick County's estimated 2025 population is 305,093 with a growth rate of 1.96% in the past year according to the most recent United States census data. Frederick County is the 7th largest county in Maryland. The 2010 population was 234,239 and has seen a growth of 30.25% since that time.

305,093
Total Population
462
Population Density (mi²)
7
Population Rank (State)
5.9K 1.96%
Annual Population Growth

Frederick County Population

Demographics

Economics and Income Statistics