White to Non-White Racial Dissimilarity (5-year estimate) Index for San Luis Obispo County, CA was 26.48% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for San Luis Obispo County, CA reached a record high of 29.97 in January of 2016 and a record low of 25.85 in January of 2012. 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 San Luis Obispo County, CA - last updated from the United States Federal Reserve on May of 2024.