How Boulder County Compares

Boulder County

37.7 years

Colorado Average

37.7 years

Rank #51 of 64 in state

National

38.9 years

3.1% below

National Distribution

Where Boulder County falls among all 3,222 U.S. counties for median age.

21.4 years 86.2 years

■ Boulder County: 37.7 years

Ranking Context

Rank	County	Value
#2,627	Dale County, AL	37.7 years
#2,628	Jefferson County, AL	37.7 years
#2,629	Drew County, AR	37.7 years
#2,630	Boulder County, CO	37.7 years
#2,631	Prowers County, CO	37.7 years
#2,632	Bleckley County, GA	37.7 years
#2,633	Clinch County, GA	37.7 years

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Median Age in Boulder County, Colorado

Boulder County, Colorado has a median age of 37.7 years, which ranks #2,630 of 3,222 out of 3,222 counties nationwide. This is 3.1% below the national value of 38.9 years.

Within Colorado, Boulder County ranks #51 of 64 out of 64 counties. This places it in the 18th percentile nationally.

The median age of the total population. 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.