White to Non-White Racial Dissimilarity (5-year estimate) Index for Grafton County, NH was 37.66% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Grafton County, NH reached a record high of 53.34 in January of 2009 and a record low of 37.66 in January of 2022. 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 Grafton County, NH - last updated from the United States Federal Reserve on May of 2024.