White to Non-White Racial Dissimilarity (5-year estimate) Index for Mountrail County, ND was 29.98% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Mountrail County, ND reached a record high of 42.46 in January of 2014 and a record low of 20.64 in January of 2010. 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 Mountrail County, ND - last updated from the United States Federal Reserve on May of 2024.