Resident Population in Vermillion County, IN was 15.41700 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Vermillion County, IN reached a record high of 18.30400 in January of 1981 and a record low of 15.40900 in January of 2020. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Vermillion County, IN - last updated from the United States Federal Reserve on June of 2024.