White to Non-White Racial Dissimilarity (5-year estimate) Index for Loudoun County, VA was 31.63% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Loudoun County, VA reached a record high of 32.77 in January of 2020 and a record low of 22.94 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 Loudoun County, VA - last updated from the United States Federal Reserve on May of 2024.