Arapahoe County, Colorado
Located in Colorado, Arapahoe County has a population of 659,844 residents and a median age of 37.3 years, making it the #106 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 8.6%. The median home value is $561,200, and the median household income is $101,087, which is 35% above the national median.
Demographics
Arapahoe County has a population of 659,844, making it the #106 most populous county in the US. The median age is 37.3 years, which is 4.1% below the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Arapahoe County is $101,087, ranking #162 out of 3,222 counties — 34.5% above the national median. The poverty rate is 8.6% and unemployment stands at 4.9%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Arapahoe County is $561,200 (+99.1% vs national). Renters pay a median of $1,891/mo and the homeownership rate is 64.7%.
Median Home Value Trend
Rankings →Household Type
Education
In Arapahoe County, 46.5% of adults age 25+ hold a bachelor's degree or higher, which is 38.0% above the national average, ranking #143 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Arapahoe County is 79.1 years. 14.2% of adults report poor or fair health and 9.8% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
12.6% of adults in Arapahoe County smoke , 25.7% are obese , and 21.5% report excessive drinking. The drug overdose death rate is 24.9 per 100,000.
Adult Smoking Trend
Safety
The homicide rate in Arapahoe County is 5.7 per 100,000 and the suicide rate is 18.2 per 100,000. Motor vehicle deaths occur at a rate of 9.6 per 100,000.
Homicide Rate Trend
Families & Children
13.2% of children in Arapahoe County live in poverty and the infant mortality rate is 5.1 per 1,000 live births. The teen birth rate is 12.1 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in Arapahoe County is 77.8%. The mean commute time is 29.6 min, which is 7.3% above the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Arapahoe County voted Democratic with a margin of 20.1%. The vote was 58.6% Dem / 38.5% Rep. Compared to 2020, the margin shifted 4.5 toward Republicans .
Vote Share Over Time
About Arapahoe County, Colorado
Arapahoe County, Colorado has a total population of 659,844, making it the 106th most populous county in the United States. The median age in Arapahoe County is 37.3 years, which is 4.1% below the national median of 38.9 years.
The median household income in Arapahoe County is $101,087, which ranks #162 of 3,222 counties nationwide. This is 34.5% above the national median of $75,149. The poverty rate is 8.6%, lower than the national rate of 12.6%. The unemployment rate stands at 4.9%.
The median home value in Arapahoe County is $561,200, 99.1% above the national median. Renters in Arapahoe County pay a median gross rent of $1,891 per month. The homeownership rate is 64.7%, compared to the national rate of 64.4%.
In Arapahoe County, 46.5% of residents aged 25 and older hold a bachelor's degree or higher, 38.0% above the national average of 33.7%. Health insurance coverage stands at 90.7% of the population. The average commute time for workers is 29.6 min.
Arapahoe County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 55.2% of the population, followed by Hispanic or Latino (21.7%) and Black (non-Hispanic) (10.5%).
All data for Arapahoe County, Colorado comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.