Total Population in Boulder County, CO
ACS 2024 5-Year Estimates
How Boulder County Compares
National Distribution
Where Boulder County falls among all 3,222 U.S. counties for total population.
■ Boulder County: 328,961
Ranking Context
| Rank | County | Value |
|---|---|---|
| #220 | Henrico County, VA | 335,744 |
| #221 | Durham County, NC | 332,353 |
| #222 | Greater Bridgeport Planning Region, CT | 329,259 |
| #223 | Boulder County, CO | 328,961 |
| #224 | Luzerne County, PA | 327,675 |
| #225 | Lancaster County, NE | 326,696 |
| #226 | Escambia County, FL | 325,923 |
Total Population in Boulder County, Colorado
Boulder County, Colorado has a total population of 328,961, which ranks #223 of 3,222 out of 3,222 counties nationwide. This is 99.9% below the national value of 330M.
Within Colorado, Boulder County ranks #9 of 64 out of 64 counties. This places it in the 93th 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.