Population Estimate, Total, Not Hispanic or Latino, Asian Alone (5-year estimate) in St. Clair County, IL was 3984.00000 Persons in January of 2022, according to the United States Federal Reserve. Historically, Population Estimate, Total, Not Hispanic or Latino, Asian Alone (5-year estimate) in St. Clair County, IL reached a record high of 3984.00000 in January of 2022 and a record low of 2882.00000 in January of 2009. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Estimate, Total, Not Hispanic or Latino, Asian Alone (5-year estimate) in St. Clair County, IL - last updated from the United States Federal Reserve on May of 2024.