Resident Population in Jennings County, IN was 27.62200 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Jennings County, IN reached a record high of 28.48200 in January of 2010 and a record low of 19.45400 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Jennings County, IN - last updated from the United States Federal Reserve on May of 2024.