Resident Population in La Salle County, IL was 108.30900 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in La Salle County, IL reached a record high of 113.81200 in January of 2010 and a record low of 106.30300 in January of 1988. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in La Salle County, IL - last updated from the United States Federal Reserve on May of 2024.