St. Clair County

St. Clair County is a county in Illinois, United States. The population in St. Clair County was 252,671 in 2022. The median age in St. Clair County was 39.2 in 2021. The median income in St. Clair County was $33,092 in 2021. The unemployment rate in St. Clair County was 4% in 2023. The percentage of people with obesity in St. Clair County was 43.7% in 2021. The percentage of people who binge drink in St. Clair County was 16.3% in 2021. The percentage of people who smoke in St. Clair County was 16.3% in 2021.