Resident Population in Indiana County, PA was 83.09400 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Indiana County, PA reached a record high of 92.85200 in January of 1983 and a record low of 79.45100 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Indiana County, PA - last updated from the United States Federal Reserve on May of 2024.