Total Population in Arapahoe County, CO
ACS 2024 5-Year Estimates
659,844
Rank #106/3,222 · #3 in CO
97th
Arapahoe 659,844
CO 5,862,189 -88.7%
US 330M
Total Population Trend
Rankings →Percentile Rank Over Time
Year-over-Year Population Change
National Distribution
How Arapahoe County's total population of 659,844 compares to all 3,222 U.S. counties. Values range from 33 to 9,808,667.
Distribution of Total Population Across All Counties
Ranking Context
Counties ranked closest to Arapahoe County for total population.
Nearby Rankings
Full ranking →| #103 | Jefferson County, AL | 667,755 |
| #104 | Providence County, RI | 664,854 |
| #105 | Kent County, MI | 663,150 |
| #106 | Arapahoe County, CO | 659,844 |
| #107 | Ocean County, NJ | 654,362 |
| #108 | Bucks County, PA | 647,461 |
| #109 | Monmouth County, NJ | 645,353 |
About Total Population
Arapahoe County, Colorado has a total population of 659,844, ranking #106 of 3,222 counties nationwide — 99.8% below the national value of 330M. Within Colorado, it ranks #3 of 64. This places it in the 97th percentile nationally.
Total population count from the American Community Survey. Source: U.S. Census Bureau, American Community Survey 2024 5-Year Estimates. All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.