Arapahoe County is a county in the U.S. state of Colorado, CO with an estimated population of 651,215 as of July 1, 2018 and is thus ranked 174 in the United States.
In contrast to the 2010 census, the population of Arapahoe County was still 572,130. This means that the 2018 population percent change from 2010 population of Arapahoe County has risen by 13.8%.
Arapahoe County is formed in 1861-11-01 and covers an total area of 805.44 square miles. This area is divided into 798.10 square miles land area and 7.34 square miles water area. Density per square kilometre of land area are 716.7 of population in 298.6 housing units.
There were 238,301 housing units in the whole of Arapahoe County for the 2010 census with 224.011 total households, 146.128 of them family households. At the 1990 census, the population of Arapahoe County was still 391,572. 2011 population percent change from 1990 population of Arapahoe County was still 46,10 %, or expressed in detail 180.492 inhabitants. 2017 ACS Population - High School Diploma or more as a percent of 2017 ACS Population - Population 25 and over was 92.3% (percent) and is ranked number 495 of all counties in the United States.
Labor Force 2018 in Arapahoe County was 362,692 and is ranked number 92, with a Unemployment Rate 2018 of 3.2 % (percent), which is ranked on number 2239 of all counties in the United States. Median Household Income 2017 was $75,196 (percent), which is ranked on number 189 of all counties in the United States. To the area of Arapahoe County also includes Denver-Aurora-Lakewood, CO Metropolitan Statistical Area and Denver-Aurora, CO Combined Statistical Area.