Population Estimate, Total, Hispanic or Latino (5-year estimate) in Washington County, IL was 212.00000 Persons in January of 2022, according to the United States Federal Reserve. Historically, Population Estimate, Total, Hispanic or Latino (5-year estimate) in Washington County, IL reached a record high of 232.00000 in January of 2015 and a record low of 162.00000 in January of 2010. 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 Washington County, IL - last updated from the United States Federal Reserve on May of 2024.