Resident Population in Trumbull County, OH was 200.37300 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Trumbull County, OH reached a record high of 247.00000 in January of 1972 and a record low of 198.06900 in January of 2019. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Trumbull County, OH - last updated from the United States Federal Reserve on May of 2024.