Frederick County Flag

Frederick County

State:
Maryland
County Seat:
Frederick

Frederick County's estimated 2025 population is 304,480 with a growth rate of 1.72% 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 29.99% since that time.

304,480
Total Population
461
Population Density (mi²)
7
Population Rank (State)
5.2K 1.72%
Annual Population Growth

Frederick County Population

Demographics

Economics and Income Statistics

Sources

  1. City and Town Population Totals: 2020-2024
  2. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  3. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  4. American Community Survey (2009 - 2013)
  5. Census QuickFacts
  6. Historical Populations of States and Counties (1790 - 1990)