Resident Population in Ross County, OH was 76.50100 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Ross County, OH reached a record high of 78.10200 in January of 2010 and a record low of 60.90000 in January of 1971. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Ross County, OH - last updated from the United States Federal Reserve on May of 2024.