Adams County Flag

Adams County

State:
Colorado
County Seat:
Brighton

Adams County's estimated 2025 population is 550,269 with a growth rate of 1.34% in the past year according to the most recent United States census data. Adams County is the 5th largest county in Colorado. The 2010 population was 443,692 and has seen a growth of 24.02% since that time.

550,269
Total Population
472
Population Density (mi²)
5
Population Rank (State)
7.3K 1.34%
Annual Population Growth

Adams 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)