Arapahoe County, Colorado Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Arapahoe County, CO Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
-
A
Health Above averageHealthier than 74% of counties in Colorado
-
B
Income Around averageWealthier than 82% of counties in Colorado
-
A
Education Above averageBetter educated than 73% of counties in Colorado
Source: Map AI Methodology
Population: density and quick facts
| Metric | Arapahoe County | Colorado Avg | U.S. Average |
|---|---|---|---|
| Population | 647,849 | 5,842,429 | 337,468,954 |
| Population density (per sq mi) | 804.8 | 56.1 | 86.4 |
| Population growth (%/yr) | 0.65% | 1.09% | 0.59% |
| Median age | 38.7 | 35.2 | 37.3 |
| Households | 252,096 | 2,364,171 | 130,235,071 |
Population in Arapahoe County grew by 20.7% from 2009 to 2024, reaching 647,849 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Arapahoe County is Millennials, aged 29–44, at 25.0% of residents. That is 0.7 points above Colorado as a whole.
- Gen Z 13–28 140,018 21.6% -1.0 pts
- Millennials 29–44 161,675 25.0% +0.7 pts
- Gen X 45–60 128,816 19.9% on par
- Boomers 61–79 93,643 14.5% -0.8 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Colorado, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 50.1% of the people living in Arapahoe County and men 49.9%.
- Women 50.1% Colorado 49.4%
- Men 49.9% Colorado 50.6%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Arapahoe County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Arapahoe County has a the economy index of B, which means it is quite prosperous.
| Metric | Arapahoe County | Colorado Avg | U.S. Average |
|---|---|---|---|
| Median household income | $101,681 | $95,803 | $80,455 |
| Income growth (%/yr) | 5.36% | 5.41% | 4.80% |
| Unemployment rate | 4.9% | 4.6% | 5.2% |
The median household income in Arapahoe County is about 6% higher than in Colorado.
Housing
| Metric | Arapahoe County | Colorado Avg | U.S. Average |
|---|---|---|---|
| Median home price | $489,057 | $484,034 | $248,835 |
| Median rent | $1,890 | $1,761 | $1,407 |
| Homeownership rate | 65.0% | 66.2% | 65.2% |
The median home price in Arapahoe County is about 21.6 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,890 per month for that long.
Commute Time & Mobility
Commuters in Arapahoe County spend about 50 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 210 hours, about 8.7 full days, spent commuting.
| Metric | Arapahoe County | Colorado Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 25.2 | 22.0 | 22.4 |
| Round-trip commute (min) | 50.3 | 44.1 | 44.8 |
| Yearly time spent (hours) | 210 | 184 | 187 |
| Estimated yearly cost | $6,499 | $5,694 | $5,790 |
| Work from home | 21.1% | 21.0% | 15.0% |
| Highway traffic (vehicles/day) | 18,011 | 8,183 | 8,813 |
| Local road traffic (vehicles/day) | 3,291 | 1,277 | 1,355 |
Fastest commutes among counties in
Colorado:
Hinsdale County (6.6 min), Prowers County (7.6 min), Cheyenne County (7.7 min).
Slowest:
Park County (42.5 min), Elbert County (41.5 min), Teller County (31.3 min).
The average commute time in Arapahoe County is 25 minutes, longer than the 22 minutes in Colorado.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Arapahoe County has a education index of A, which means it is very educated.
| Metric | Arapahoe County | Colorado Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 41.9% | 40.3% | 31.6% |
| Average household size | 2.54 | 2.42 | 2.53 |
Highest education index among counties in
Colorado:
Boulder County (0.5), Douglas County (0.4), Broomfield County (0.4).
Lowest:
Crowley County (0.2), Bent County (0.2), Lincoln County (0.2).
Health
Arapahoe County has a health index of A, which means it is very healthy.
| Metric | Arapahoe County | Colorado Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 79.7 | 80.0 | 78.3 |
| Self-rated poor health | 10.0% | 13.2% | 16.3% |
| Smokers | 14.0% | 16.1% | 19.0% |
Highest health index among counties in
Colorado:
Douglas County (0.9), Boulder County (0.8), Broomfield County (0.8).
Lowest:
Costilla County (0.8), Otero County (0.8), Bent County (0.8).
Arapahoe County, CO Compared With Nearby Counties
Arapahoe County, CO is the 2nd largest of the 6 counties compared here, 647,849 residents against a local median of 377,140. Where Arapahoe County, CO breaks from the counties next to it is median home price, sitting 22% below the local median of $626,775 at $489,057.
Median household income tells the same story from another angle: $101,681 against a local median of $123,906, 18% below it. The one measure here that carries a verdict is median household income, and at 18% below the local median it puts Arapahoe County, CO at the weaker end of the local range. The counties themselves spread $224,840 on median home price, so Arapahoe County, CO sits at one end of an already wide local range rather than apart from it. Arapahoe County, CO has the 5th highest median home price of the 6 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Arapahoe County, CO | 647,849 | $101,681 #4/6 | $489,057 #5/6 | 25.2 min #4/6 |
| Adams County, CO | 525,525 | $95,784 | $476,309 | 28.3 min |
| Elbert County, CO | 27,839 | $130,488 | $626,775 | 41.5 min |
| Denver County, CO | 718,150 | $94,979 | $618,408 | 22.9 min |
| Douglas County, CO | 377,140 | $149,583 | $701,148 | 23.6 min |
| Broomfield County, CO | 76,305 | $123,906 | $685,833 | 22.9 min |
Frequently Asked Questions
Common questions about Arapahoe County, Colorado.
What is the population of Arapahoe County, Colorado?
About 647,849 people live in Arapahoe County, Colorado, in 252,096 households of 2.5 people on average. The median age is 38.7, close to the U.S. median of 37.3.
Is Arapahoe County, Colorado mostly urban or rural?
Averaged over its land area, Arapahoe County, Colorado has 805 people per square mile, a density typical of a mix of suburbs, small towns and farmland. That is about 9.3 times the U.S. average of 86.
Can a typical household afford a home in Arapahoe County, Colorado?
The median home costs 4.8 times the median household income ($489,057 against $101,681), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $1,890 a month takes about 22% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
How common is a college degree in Arapahoe County, Colorado?
41.9% of adults in Arapahoe County, Colorado hold a bachelor's degree or higher (about 1 in 2), well above the U.S. share of 31.6%.
Analyze any area in the US
Get local demographics for any address, aggregated by drive time or radius, on the interactive map.
Explore the map →