Resident Population in Greene County, PA was 34.35700 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Greene County, PA reached a record high of 41.19300 in January of 1984 and a record low of 34.35700 in January of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Greene County, PA - last updated from the United States Federal Reserve on May of 2024.