Arapahoe County is Colorado’s first county and the state’s third largest county with a population of 651,215. The County has grown by more than 75,000 people since the 2010 Census. Demographic information is a great way for residents and visitors to learn more about Arapahoe County. The following data was collected from 2018 Census Bureau reports.
Population is651,215. Only Denver and El Paso Counties are larger.
242,141 households. Since 2010, the population of persons 65 and over living alone in Arapahoe County has grown by 29 percent.
36.9 years is the median age in the County. This is an increase of 1.2 years since 2010
$76,768 is the median household income - $5,000 higher than that state-wide median income.
92.3 percent of Arapahoe County residents are high school graduates or higher.
42 percent have a bachelor's degree or higher - a 5 percent increase since 2010.
40.7 percent Bachelor's Degree or higher, percent of persons age 25+.
254,250 housing units in the County, of which 63 percent are owner occupied.