Arapahoe County, Colorado Demographics 2026

Population Overview

Arapahoe County is located in Colorado with a total population of 655,709. It is the 3rd most populous county out of 64 in Colorado.

Age Demographics

The median age in Arapahoe County is 37.3 years. This is about average than the state median of 37.5 years.

Economy, Income & Housing

The median household income in Arapahoe County is $97,215. This is 5% higher than the state median of $92,470. Compared to the national median of $78,538, household income here is 24% higher. The poverty rate stands at 8.5%. This is 9% lower than the state poverty rate of 9.4%. The unemployment rate is 4.7%. This is 4% higher than the state rate of 4.5%. The median home value is $526,000. Housing costs are 5% higher than the state median of $502,200. The home-value-to-income ratio is 5.4x. 65.1% of occupied housing units are owner-occupied. This homeownership rate is 2% lower than the state average of 66.3%.

Race & Ethnicity

The largest racial or ethnic group in Arapahoe County is White (non-Hispanic), making up 56.4% of the population. Hispanic or Latino residents account for 21.2%. The Black or African American population is significantly higher than the state average (10.5% vs 3.8%). The Asian population is significantly higher than the state average (5.9% vs 3.2%).

Education

45.7% of residents aged 25 and older hold a bachelor's degree or higher. This is 2% higher than the state rate of 44.7%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 92.0%. Notably, 17.5% of adults hold a graduate or professional degree, indicating a highly educated workforce.