White to Non-White Racial Dissimilarity (5-year estimate) Index for Hillsborough County, NH was 40.81% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Hillsborough County, NH reached a record high of 43.40 in January of 2016 and a record low of 36.08 in January of 2009. 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 Hillsborough County, NH - last updated from the United States Federal Reserve on May of 2024.