Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Piatt County, IL was 15960.00000 Persons in January of 2022, according to the United States Federal Reserve. Historically, Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Piatt County, IL reached a record high of 16290.00000 in January of 2010 and a record low of 15235.00000 in January of 2017. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Piatt County, IL - last updated from the United States Federal Reserve on May of 2024.