| Name | Arapahoe County |
| State | Colorado |
| FIPS Code | 08005 |
| County Seat | Littleton |
| Timezone | Mountain Daylight Time (MDT) |
| Population (2024) | 661,864 |
| Population Growth Rate(2020-2024) | 1.03% |
| Majority Ethnicity | White 61.17% |
| Public School Majority Ethnicity | White 40% |
| Partisan Voting Index | Democratic:+10 |
| Unemployment Rate (May 2026) | 4.2% |
| Sales Tax Rate (2025) | 3.25% |
| Area Code(s) | 303 / 720 / 983 / 970 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 61.17% |
| African American | 10.72% |
| Hispanic | 20.94% |
| Asian | 5.93% |
| Native American | 0.97% |
| Hawaiin/Pacific Islander | 0.28% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 40.17% |
| African American | 12.49% |
| Hispanic | 32.89% |
| Asian | 6.28% |
| Native American | 0.52% |
| Hawaiin/Pacific Islander | 0.45% |