Resident Population in Clinton County, PA was 37.60700 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Clinton County, PA reached a record high of 39.83500 in January of 2013 and a record low of 36.88100 in January of 2009. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Clinton County, PA - last updated from the United States Federal Reserve on May of 2024.