High School Graduate or Higher (5-year estimate) in Gallia County, OH was 86.30% in January of 2022, according to the United States Federal Reserve. Historically, High School Graduate or Higher (5-year estimate) in Gallia County, OH reached a record high of 86.30 in January of 2022 and a record low of 79.30 in January of 2014. Trading Economics provides the current actual value, an historical data chart and related indicators for High School Graduate or Higher (5-year estimate) in Gallia County, OH - last updated from the United States Federal Reserve on May of 2024.