White to Non-White Racial Dissimilarity (5-year estimate) Index for Monmouth County, NJ was 36.54% in January of 2023, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Monmouth County, NJ reached a record high of 43.22 in January of 2010 and a record low of 36.30 in January of 2019. 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 Monmouth County, NJ - last updated from the United States Federal Reserve on September of 2025.