Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Grundy County, IL was 44264.00000 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 Grundy County, IL reached a record high of 44446.00000 in January of 2021 and a record low of 41336.00000 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, White Alone (5-year estimate) in Grundy County, IL - last updated from the United States Federal Reserve on May of 2024.