Total Population in Jefferson County, CO
ACS 2024 5-Year Estimates
How Jefferson County Compares
National Distribution
Where Jefferson County falls among all 3,222 U.S. counties for total population.
■ Jefferson County: 579,377
Ranking Context
| Rank | County | Value |
|---|---|---|
| #116 | Douglas County, NE | 590,736 |
| #117 | Bristol County, MA | 582,270 |
| #118 | Volusia County, FL | 579,622 |
| #119 | Jefferson County, CO | 579,377 |
| #120 | Union County, NJ | 579,290 |
| #121 | Delaware County, PA | 579,222 |
| #122 | New Castle County, DE | 577,961 |
Total Population in Jefferson County, Colorado
Jefferson County, Colorado has a total population of 579,377, which ranks #119 of 3,222 out of 3,222 counties nationwide. This is 99.8% below the national value of 330M.
Within Colorado, Jefferson County ranks #4 of 64 out of 64 counties. This places it in the 96th percentile nationally.
Total population count from the American Community Survey. All data comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates for 2024.
About this data
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2024). All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.