Resident Population in Wabash County, IL was 10.97900 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Wabash County, IL reached a record high of 14.02100 in January of 1983 and a record low of 10.97900 in January of 2024. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Wabash County, IL - last updated from the United States Federal Reserve on April of 2026.