Adams County Flag

Adams County

State:
Colorado
County Seat:
Brighton

Adams County's 2026 population is estimated at 560,079, reflecting a 0.98% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Adams County is the 5th largest county in Colorado. The 2010 population was 443,692 and has grown 26.23% since 2010.

560,079
Total Population
480
Population Density (mi²)
5
Population Rank (State)
5.4K 0.98%
Annual Population Growth

Adams County Population

Demographics

Economics and Income Statistics