Resident Population in Fulton County, OH was 42.02800 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Fulton County, OH reached a record high of 42.64000 in January of 2020 and a record low of 33.07100 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Fulton County, OH - last updated from the United States Federal Reserve on April of 2026.