White to Non-White Racial Dissimilarity (5-year estimate) Index for Somerset County, NJ was 35.34% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Somerset County, NJ reached a record high of 39.72 in January of 2010 and a record low of 35.34 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 Somerset County, NJ - last updated from the United States Federal Reserve on May of 2024.