White to Non-White Racial Dissimilarity (5-year estimate) Index for Multnomah County, OR was 27.11% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Multnomah County, OR reached a record high of 31.56 in January of 2009 and a record low of 27.09 in January of 2020. 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 Multnomah County, OR - last updated from the United States Federal Reserve on May of 2024.