Jefferson County Population 2017

Jefferson County's estimated population is 571,837 with a growth rate of 1.18% in the past year according to the most recent United States census data. Jefferson County is the 4th largest county in Colorado.

Year Population Growth Growth Rate
2016571,8376,6941.18%
2015565,1436,0671.09%
2014559,0767,1641.30%
2013551,9125,8321.07%
2012546,0806,2151.15%
2011539,8653,9490.74%
2010535,91697,48622.24%
1990438,43066,67717.94%
1980371,753138,72259.53%
1970233,031105,51182.74%
1960127,52071,833128.99%
195055,68724,96281.24%
194030,7258,91540.88%
193021,8107,41051.46%
192014,4001691.19%
191014,2314,92552.92%
19009,30685610.13%
18908,4501,64624.19%
18806,8044,414184.69%
18702,3900.00%

Jefferson County Population Growth

Population Data via

Jefferson County Race Data

Race Population Percentage
White521,16691.14%
Asian16,2322.84%
Two or More Races13,3122.33%
Black or African American7,0041.22%
American Indian and Alaska Native6,7551.18%
Native Hawaiian and Other Pacific Islander6740.12%

Jefferson County Population Pyramid

0k5k10k15k20kJefferson County Male Population0k5k10k15k20kJefferson County Female Population

Population of Cities in Jefferson County

City 2010 Census 2016 Estimated Growth Growth Rate
Denver5998646930609319615.54%
Arvada1065241174531092910.26%
Broomfield55866665291066319.09%
Littleton4165146333468211.24%
Wheat Ridge301923137211803.91%
Golden189092069617879.45%
Morrison425435102.35%
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