Jefferson County, CO — Demographics & Population
Population, age distribution, race & ethnicity, and education data
Population Overview
Source: Census Bureau ACS (2023)Total Population
579,715
Male
291,622
50.3%
Female
288,093
49.7%
Median Age
40.4 yrs
Avg Household Size
2.4
Foreign Born
6.1%
Race & Ethnicity
Source: Census Bureau ACS (2023)Age Distribution
Source: Census Bureau ACS (2023)Education
Source: Census Bureau ACS (2023)Bachelor's or Higher37.4%
High School or Higher51.0%
Other Demographics
Source: Census Bureau ACS (2023)Veterans
5.5%
Disability
0.0%
Non-English Home
3.3%
Married
44.5%
Jefferson County, CO has a population of 579,715 according to 2023 Census Bureau estimates. The median age is 40.4 years. The largest racial or ethnic group is White at 82.0% of the population. 37.4% of residents hold a bachelor's degree or higher. 6.1% of residents are foreign-born.