In 2021, St. Clair County, MO had a population of 9.24k people with a median age of 48.7 and a median household income of $40,470. Between 2020 and 2021 the population of St. Clair County, MO declined from 9,455 to 9,235, a −2.33% decrease and its median household income grew from $39,000 to $40,470, a 3.77% increase.
The 5 largest ethnic groups in St. Clair County, MO are White (Non-Hispanic) (93.1%), Two+ (Non-Hispanic) (3.39%), Other (Hispanic) (1.14%), White (Hispanic) (0.758%), and Black or African American (Non-Hispanic) (0.617%).
None of the households in St. Clair County, MO reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
99.4% of the residents in St. Clair County, MO are U.S. citizens.
In 2021, the median property value in St. Clair County, MO was $112,800, and the homeownership rate was 78.9%.
Most people in St. Clair County, MO drove alone to work, and the average commute time was 28.1 minutes. The average car ownership in St. Clair County, MO was 3 cars per household.
St. Clair County, MO borders Bates County, MO, Benton County, MO, Cedar County, MO, Henry County, MO, Hickory County, MO, Polk County, MO, and Vernon County, MO.