In 2019, St. Clair County, MI had a population of 159k people with a median age of 43.8 and a median household income of $56,951. Between 2018 and 2019 the population of St. Clair County, MI declined from 159,566 to 159,247, a −0.2% decrease and its median household income grew from $55,240 to $56,951, a 3.1% increase.
The 5 largest ethnic groups in St. Clair County, MI are White (Non-Hispanic) (91.1%), Two+ (Non-Hispanic) (2.44%), White (Hispanic) (2.43%), Black or African American (Non-Hispanic) (2.18%), and Asian (Non-Hispanic) (0.634%). 0% of the households in St. Clair County, MI speak a non-English language at home as their primary language.
99% of the residents in St. Clair County, MI are U.S. citizens.
The largest universities in St. Clair County, MI are St Clair County Community College (929 degrees awarded in 2019), Ross Medical Education Center-Port Huron (53 degrees), and Paul Mitchell the School-Great Lakes (52 degrees).
In 2019, the median property value in St. Clair County, MI was $154,300, and the homeownership rate was 77.3%. Most people in St. Clair County, MI drove alone to work, and the average commute time was 28.5 minutes. The average car ownership in St. Clair County, MI was 2 cars per household.