In 2017, St. Clair County, MO had a population of 9.4k people with a median age of 50 and a median household income of $35,066. Between 2016 and 2017 the population of St. Clair County, MO declined from 9,444 to 9,396, a -0.508% decrease and its median household income grew from $33,750 to $35,066, a 3.9% increase.
The population of St. Clair County, MO is 94.5% White Alone, 2.67% Two or More Races, and 1.04% Hispanic or Latino. N/A% of the people in St. Clair County, MO speak a non-English language, and 99.7% are U.S. citizens.
The median property value in St. Clair County, MO is $78,500, and the homeownership rate is 75.2%. Most people in St. Clair County, MO commute by Drove Alone, and the average commute time is 26.4 minutes. The average car ownership in St. Clair County, MO is 2 cars per household.