Adams County Population 2017

Adams County's estimated population is 498,187 with a growth rate of 1.53% in the past year according to the most recent United States census data. Adams County is the 5th largest county in Colorado.

Year Population Growth Growth Rate
2016498,1877,5131.53%
2015490,67410,2282.13%
2014480,44610,3392.20%
2013470,1079,6352.09%
2012460,4728,4321.87%
2011452,0408,3591.88%
2010443,681178,64367.40%
1990265,03819,0947.76%
1980245,94460,15532.38%
1970185,78965,49354.44%
1960120,29680,062198.99%
195040,23417,75378.97%
194022,4812,23611.04%
193020,2455,81540.30%
192014,4305,53862.28%
19108,8920.00%

Adams County Population Growth

Population Data via

Adams County Race Data

Race Population Percentage
White425,77185.46%
Asian20,2264.06%
Black or African American18,3033.67%
Two or More Races14,6842.95%
American Indian and Alaska Native10,6162.13%
Native Hawaiian and Other Pacific Islander1,0740.22%

Adams County Population Pyramid

0k5k10k15k20kAdams County Male Population0k5k10k15k20kAdams County Female Population

Population of Cities in Adams County

City 2010 Census 2016 Estimated Growth Growth Rate
Denver5998646930609319615.54%
Aurora3246843617103702611.40%
Thornton1187771367031792615.09%
Westminster10616011387577157.27%
Commerce City4591754869895219.50%
Brighton3378038314453413.42%
Bennett230524881837.94%
Data Sources
  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990