Resident Population in Susquehanna County, PA was 38.10900 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Susquehanna County, PA reached a record high of 43.33300 in January of 2010 and a record low of 34.34400 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Susquehanna County, PA - last updated from the United States Federal Reserve on May of 2024.