White to Non-White Racial Dissimilarity (5-year estimate) Index for Pennington County, SD was 18.75% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Pennington County, SD reached a record high of 26.87 in January of 2015 and a record low of 18.75 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 Pennington County, SD - last updated from the United States Federal Reserve on May of 2024.