Population Estimate, Total, Not Hispanic or Latino, Asian Alone (5-year estimate) in Stephenson County, IL was 405.00000 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 Stephenson County, IL reached a record high of 405.00000 in January of 2022 and a record low of 343.00000 in January of 2021. 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 Stephenson County, IL - last updated from the United States Federal Reserve on May of 2024.