White to Non-White Racial Dissimilarity (5-year estimate) Index for Gallia County, OH was 38.73% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Gallia County, OH reached a record high of 38.73 in January of 2022 and a record low of 23.74 in January of 2011. Trading Economics provides the current actual value, an historical data chart and related indicators for White to Non-White Racial Dissimilarity (5-year estimate) Index for Gallia County, OH - last updated from the United States Federal Reserve on May of 2024.