Jefferson County

Jefferson County is a county in Missouri, United States. The population in Jefferson County was 229,336 in 2022. The median age in Jefferson County was 39.9 in 2021. The median income in Jefferson County was $35,700 in 2021. The unemployment rate in Jefferson County was 2.6% in 2023. The percentage of people with obesity in Jefferson County was 37.3% in 2021. The percentage of people who binge drink in Jefferson County was 18.3% in 2021. The percentage of people who smoke in Jefferson County was 19.5% in 2021.
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