In 2020, St. Clair County, MO had a population of 9.46k people with a median age of 49.3 and a median household income of $39,000. Between 2019 and 2020 the population of St. Clair County, MO grew from 9,370 to 9,455, a 0.907% increase and its median household income grew from $38,870 to $39,000, a 0.334% increase.
The 5 largest ethnic groups in St. Clair County, MO are White (Non-Hispanic) (93.7%), Two+ (Non-Hispanic) (2.78%), White (Hispanic) (1.08%), Other (Hispanic) (0.962%), and Black or African American (Non-Hispanic) (0.613%).
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.
99.7% of the residents in St. Clair County, MO are U.S. citizens.
In 2020, the median property value in St. Clair County, MO was $95,100, and the homeownership rate was 80.4%. Most people in St. Clair County, MO drove alone to work, and the average commute time was 25.8 minutes. The average car ownership in St. Clair County, MO was 3 cars per household.