White to Non-White Racial Dissimilarity (5-year estimate) Index for Onslow County, NC was 28.61% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Onslow County, NC reached a record high of 28.61 in January of 2022 and a record low of 23.29 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 Onslow County, NC - last updated from the United States Federal Reserve on May of 2024.