How Jefferson County Compares

Jefferson County

40.5 years

Colorado Average

40.5 years

Rank #40 of 64 in state

National

38.9 years

4.1% above

National Distribution

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

21.4 years 86.2 years

■ Jefferson County: 40.5 years

Ranking Context

Rank	County	Value
#1,943	Grant County, AR	40.5 years
#1,944	Saline County, AR	40.5 years
#1,945	Contra Costa County, CA	40.5 years
#1,946	Jefferson County, CO	40.5 years
#1,947	Yuma County, CO	40.5 years
#1,948	Berrien County, GA	40.5 years
#1,949	Brantley County, GA	40.5 years

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Median Age in Jefferson County, Colorado

Jefferson County, Colorado has a median age of 40.5 years, which ranks #1,946 of 3,222 out of 3,222 counties nationwide. This is 4.1% above the national value of 38.9 years.

Within Colorado, Jefferson County ranks #40 of 64 out of 64 counties. This places it in the 40th 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.