Jefferson County

Jefferson County is a county in Colorado, United States. The population in Jefferson County was 576,143 in 2022. The median age in Jefferson County was 40.2 in 2021. The median income in Jefferson County was $46,381 in 2021. The unemployment rate in Jefferson County was 3.1% in 2023. The percentage of people with obesity in Jefferson County was 24.1% in 2021. The percentage of people who binge drink in Jefferson County was 22% in 2021. The percentage of people who smoke in Jefferson County was 12.5% in 2021.