Population Estimate, Total, Hispanic or Latino (5-year estimate) in St. Clair County, MI was 5832.00000 Persons in January of 2022, according to the United States Federal Reserve. Historically, Population Estimate, Total, Hispanic or Latino (5-year estimate) in St. Clair County, MI reached a record high of 5832.00000 in January of 2022 and a record low of 4486.00000 in January of 2009. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Estimate, Total, Hispanic or Latino (5-year estimate) in St. Clair County, MI - last updated from the United States Federal Reserve on May of 2024.